Home Physical Sciences The crystal structure of 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 2-fluorobenzoate hydrate, C23H25F2N3O6
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The crystal structure of 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 2-fluorobenzoate hydrate, C23H25F2N3O6

  • Shu-hui Wang , Cheng-Yu Yang , Jia-Shu He and Cheng-Jun Jiang ORCID logo EMAIL logo
Published/Copyright: September 16, 2025
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Zeitschrift für Kristallographie - New Crystal Structures
From the journal Zeitschrift für Kristallographie - New Crystal Structures Volume 240 Issue 6

Abstract

C23H25F2N3O6, triclinic, P 1 ‾ , a = 7.3162(3) Å, b = 10.4107(5) Å, c = 15.4537(7) Å, α = 84.3830(10)°, β = 82.7090(10)°, γ = 70.1110(10)°, V = 1096.01(9) Å3, Z = 2, Rgt(F) = 0.0376, wRref(F2) = 0.1097, T = 170 K.

CCDC no.: 2484939

The molecular structure is shown in the figure. Table 1 contains the crystallographic data and the list of the atoms including atomic coordinates and displacement parameters can be found in the cif-file attached to this article.

Table 1:

Data collection and handling.

Crystal: Colourless block
Size: 0.28 × 0.10 × 0.06 mm
Wavelength: Ga Kα radiation (1.34139 Å)
μ: 0.65 mm−1
Diffractometer, scan mode: Bruker APEX2, φ and ω scans
θmax, completeness: 60.7°, 98 %
N(hkl)measured, N(hkl)unique, Rint: 23440, 4977, 0.034
Criterion for Iobs, N(hkl)gt: Iobs > 2 σ(Iobs), 4,686
N(param)refined: 312
Programs: Bruker, 1 Olex2, 2 SHELX 3 , 4

1 Source of materials

Equimolar quantities of norfloxacin (0.032 g) and 2-fluorobenzoic acid (0.014 g) were given in a 10 mL glass vial. The solid mixture was subsequently treated with a binary solvent system consisting of deionized water (2 mL) and absolute ethanol (2 mL). The mixture was transferred to a temperature-controlled magnetic stirring apparatus and gradually heated to 60 °C under gentle agitation (200 rpm) until complete dissolution was achieved. Through controlled solvent evaporation, the system was maintained in a metastable supersaturated state for 24 h to facilitate crystal nucleation and growth. The resulting suspension was vacuum-filtered through a Büchner funnel to isolate the crystalline product. The obtained compound was characterized as 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 2-fluorobenzoate hydrate.

2 Experimental details

Absorption corrections were applied by using multi-scan program. 1 Using Olex2, 2 the structure was solved with the ShelXT 3 structure solution program and refined with the ShelXL 4 refinement package. The H atoms were fixed, fixed Uiso were set to 1.2 times of All C(H) groups, C(H,H) groups and N(H,H) groups; 1.5 times of C(H,H,H,H) groups, O(H) groups and O(H,H) groups.

3 Comment

Norfloxacin, a broad-spectrum fluoroquinolone antibiotic, is widely used to treat bacterial infections. However, its therapeutic potential is limited by poor aqueous solubility and low bioavailability. To address these limitations, various salt forms of Norfloxacin have been explored, 5 , 6 , 7 , 8 including those with adipic acid, malonic acid, hydroxybenzoic acids, sulfonic acids, and non-steroidal anti-inflammatory drugs (NSAIDs). Some of us investigated the formation of norfloxacin cocrystals. 9 Additionally, ionic cocrystals, 10 , 11 cocrystals with flavonoids such as naringenin and hesperetin have been reported to improve NOR’s physicochemical properties. 12 Building upon these advancements in supramolecular crystal engineering, this study aims to develop novel pharmaceutical salts of Norfloxacin using 2-fluorobenzoic acid as counterions. These pharmaceutically acceptable phenolic acids were selected to modulate Norfloxacin’s solubility and antibacterial activity.

The asymmetric unit of the title compound contains one target cation, one counter anion as well as one water molecule (see the figure). The title crystal was formed by connecting the raw materials norfloxacin, 2-fluorobenzoic acid and water molecules through intermolecular hydrogen bonds. N3H3A in the piperazine group participates in a classical N3–H3B⋯O41(1 = −1−x, −y, −z) hydrogen bond to the oxygen atom in 2-fluorobenzoic acid; N3H3A in the piperazine group is involved in a N3–H3A⋯O52(2 = 1+x, +y, +z) hydrogen bond with 2-fluorobenzoic acid molecule. 2-Fluorobenzoic acid form hydrogen bonds with water molecule O6–H6A⋯O4.

Corresponding author: Cheng-Jun Jiang, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Liuhe Road 318#, Hangzhou, China, E-mail:

Acknowledgments

We would also like to thank Mr Jiyong Liu from the Chemistry Instrumentation Center Zhejiang University for X-ray crystallographic analysis. This work was supported by College Students’ Innovative Entrepreneurial Training Plan Program of China (Grant 202511057039).

References

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Received: 2025-07-18
Accepted: 2025-09-04
Published Online: 2025-09-16
Published in Print: 2025-12-17

© 2025 the author(s), published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 International License.

Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. The crystal structure of (1Z, 2Z)-3-phenyl-2-propenal 2-(4-bromo-2-fluorophenyl)hydrazone, C15H12BrFN2
  4. Refinement of crystal structure of 2-(2,3-dihydro-3-oxo-1 H -inden-1-ylidene)-1 H -indene-1,3(2 H )-dione C18H10O3
  5. The crystal structure of 3-(1-fluoro-2-(naphthalen-2-yl)-2-oxoethyl)-2-methoxy-3,4-dihydroisoquinolin-1(2H)-one, C22H18FNO3
  6. Crystal structure of the dinuclear copper(II) complex bis(μ2-2,2′ -{[1,3-phenylenebis-(methylene)]bis(oxy)}dibenzoaot-κ4O,O′:O′′,O′′′)-bis(dimethylformamide-κ1O)dicopper(II), C50H44Cu2N2O14
  7. Crystal structure of poly[triaqua-(μ9-biphenyl-3,3′,5,5′-tetracarboxylic-κ8 O,O:O,O′: O,O″:O,O‴)samarium(III)sodium(I)], C16H12NaSmO11
  8. The crystal structure of 5-benzyl-1-(4-fluorobenzyl)-4-((4-fluorobenzyl)oxy)-1,5-dihydro-2H-pyrrol-2-one, C25H21F2NO2
  9. The crystal structure of diammonium 2,5-dihydroxyterephthalate, C8H12N2O6
  10. Crystal structure of (E)-4-(4-(1H-1,2,4-triazol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[b]oxepin-5(2H)-one, C21H19N3O4
  11. Crystal structure of poly[oktakis(μ2-oxido-κ2O:O)-tetrakis(oxido-κ1O)-bis(μ2-1,1′-[1,4-phenylenebis(methylene)]di(1H-imidazole-κ2N:N′))-tetravanadium(V)-dizinc(II)] monohydrate, C28H30Zn2N8O13V4
  12. Crystal structure of acotiamide hydrochloride dimethylacetamide solvate (1/1), C25H40ClN5O6S
  13. Crystal structure of catena-poly[monoaqua (u2-(3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic-k4O:O′:O″:N)zinc(II))] monohydrate, C15H11NO10Zn
  14. Crystal structure of dichlorido{2,6-bis(3,5-diisopropyl-N-pyrazolyl)pyridine}zinc(II), C23H33Cl2N5Zn
  15. Crystal structure of nitrato-κ2O,O′-[hydridotris(3,5-diethylpyrazol-1-yl)borato-κ3N,N′,N″]copper(II), C21H34BCuN7O3
  16. Crystal structure of 2,7-bis(3,5-diethyl-1H-pyrazol-4-yl)-benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetrone, C28H26N6O4
  17. Crystal structure of 2-(4-chlorophenyl)benzothiazole, C13H8ClNS
  18. Synthesis and crystal structure (3R,4′S)-4′-(3,5-dibromophenyl)-1′-methyl-2H-dispiro [benzofuran-3,3′-pyrrolidine-2′,2″-indene]-1″,2,3″-trione, C26H17Br2NO4
  19. Crystal structure of bis(((3a,7a-dihydro-1H-benzo[d][1,2,3]triazol-1-yl)methyl) triphenylphosphonium) tetrachloridomanganate(II), C50H42Cl4MnN6P2
  20. The crystal structure of 4,9-bis(4-chlorophenyl)-1,6-bis(2-cyanobenzyl)-2,4a,5,6,7,7a-hexahydro-1H-2,7,5-(epiprop[2]ene[1,1,3]triyl)pyrrolo[3,4-b]pyridine-3,10-dicarbonitrile, C40H26Cl2N6
  21. The crystal structure of poly((μ2-3-(3-nitro-4-carboxylphenyl)benzoate-κ3O, O′:O″)-μ2-1,4-bis(1-imidazolyl)benzene-κ2N:N′-cadmium(II)), C26H17N5O6Cd
  22. The crystal structure of 6-hydroxy-5H-pyrrolo[3,4-b]pyridine-5,7(6H)-dione monohydrate, C7H6N2O4
  23. Crystal structure of 4-((cyclohexylsulfonyl)methyl)-1,2,3,4-tetrahydrobenzo [4,5]imidazo[1,2-a]pyridine, C18H24N2O2S
  24. Crystal structure of 4,7-diphenyl-1,10-phenanthroline-κ2N,N′)-bis(2,4-di(fluorine)-1-phenylpyridine-κ2C,N)-iridium(III) hexafluorophosphate–dichloromethane (1/1), C47H30Cl2F10IrN4P
  25. Crystal structure of (4-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)boronic acid, C19H15BN2O2
  26. The crystal structure of (E)-(2-((pyridin-2-ylmethylene)amino)phenyl)arsonic acid, C12H11AsN2O3
  27. The crystal structure of N(benzyl(phenyl)carbomothioyl)benzamide, C21H18N2OS
  28. The crystal structure of bis(2-picolinium) hexachlorostannate dichloromethane monosolvate, C13H18Cl8N2Sn
  29. Crystal structure of poly[tetraaqua-bis(μ4-3–1-(carboxylatomethyl)-1H-1,2,4-triazole-3-carboxylato)-κ4O:O′,O″,N)zinc(II)], C5H7N3O6Zn
  30. The crystal structure of the co-crystal isonicotinamide – 2-(nitrophenyl)methanol (1/1), C6H6N2O·C7H7NO3
  31. The crystal structure of 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 2-fluorobenzoate hydrate, C23H25F2N3O6
  32. Crystal structure of [diaqua-{1H-benzo[d]imidazol-3-ium-5,6-dicarboxylato-κ2O,O′}magnesium(II)] C18H14MgN4O10
  33. Crystal structure of (3-(dimethoxymethyl)-5-methoxy-1H-indol-1-yl) (2-iodo-5-methoxyphenyl)methanone, C20H20INO5
  34. The crystal structure of 3,7,11-trimethylbenzo[5,6][1,4]thiazino[2,3,4-kl]phenothiazine 5,5,9,9-tetraoxide, C21H17NO4S2
  35. Crystal structure of tris(piperazine-1,4-diium)bis(2-hydroxy-1,2,3-propane-tricarboxylate) pentahydrate, C24H56N6O19
  36. Crystal structure of 2-chloro-5-((5-isopropyl-2-methylphenoxy)methyl)pyridine, C16H18ClNO
  37. Crystal structure of (E)-4-(4-(1H-pyrrol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[(b)]oxepin-5(2H)-one, C23H21NO4
  38. Crystal structure of (E)-N′-(3,4-dichlorobenzylidene)-3,4,5-trimethoxybenzohydrazide, C17H16Cl2N2O4
  39. The crystal structure of 2-(2-hydroxyphenyl)-3-(pyridin-2-yl)-2,3- dihydroquinazolin-4(1H)-one, C19H15N3O2
  40. Crystal structure of 5-hydroxy-2-(4-hydroxyphenyl)-7-methoxy-8-methylchroman-4-one, C17H16O5
  41. Crystal structure of bis[(3,4-dimethoxybenzyl)triphenylphosphonium]di-μ2-bromido-dibromidodicopper(I)
  42. Crystal structure of bis [(1,3-dioxolan-2-ylmethyl)triphenylphosphonium] tetrabromidodicopper(I), C22H22Br2CuO2P
  43. Crystal structure of [1-(4-carboxyphenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid], C12H8N2O5
  44. The crystal structure of one-dimensional cooridnation polymer bis(thiocyanato)-bis((1E,2E)-1,2-bis(1-(pyridin-3-yl)ethylidene)-hydrazine κ2N:N)iron(II), (C30H28N10S2Fe)n
  45. Crystal structure of ((4-acetamidophenyl)sulfonyl)-l-alanine, C11H14N2O5S
  46. Crystal structure of [(1-naphthalen-1-yl-methyl)triphenylphosphonium] dichloridocopper(I), [C29H24P]+[CuCl2]−
  47. RbTm3S5: the first rubidium lanthanoid(III) sulfide with CsEr3Se5-type crystal structure
  48. Crystal structure of 2,2′-((ethane-1,2-diylbis(methylammoniumdiyl))bis(methylene))bis(pyridin-1-ium) diiodido-tris(μ2-iodido-κ2I:I)dicopper(II) chloride dihydrate, C16H30Cu2I6N4O2
  49. The crystal structure of 4-(trifluoromethyl)pyridine-2-carboxylic acid, C7H4F3NO2
  50. The crystal structure of (E)-2-ethoxy-1-methoxy-4-(2-(methylsulfonyl)vinyl)benzene, C12H16O4S
  51. Crystal structure of potassium 1H,1H,2H,2H-perfluorooctanesulfonate, C8H4O3F13SK
  52. Crystal structure of 4-(4-(quinolin-8-yloxy)-1,2,5-thiadiazol-3-yl)morpholine, C15H14O2N4S
  53. The crystal structure of 1,4-bis(bromomethyl)-2,5-dimethylbenzene, C10H12Br2
  54. The crystal structure of imidazo[4,5-e][1,3]diazepine-4,6,8-triamine methanol solvate, C7H11N7O
  55. The crystal structure of chlorido-bis(1,10-phenantroline-κ2N,N′)-(2-formylphenoxyacetato-κ2O,O) lead(II), C33H23N4O4ClPb
  56. Crystal structure of pyridinium tetrakis(1,1,1-trifluoro-2,4-pentadionato-κ2O,O′)yttrium(III) C20F12H16YO8C5H6N
https://doi.org/10.1515/ncrs-2025-0321
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Articles in the same Issue

  1. Frontmatter
  2. New Crystal Structures
  3. The crystal structure of (1Z, 2Z)-3-phenyl-2-propenal 2-(4-bromo-2-fluorophenyl)hydrazone, C15H12BrFN2
  4. Refinement of crystal structure of 2-(2,3-dihydro-3-oxo-1 H -inden-1-ylidene)-1 H -indene-1,3(2 H )-dione C18H10O3
  5. The crystal structure of 3-(1-fluoro-2-(naphthalen-2-yl)-2-oxoethyl)-2-methoxy-3,4-dihydroisoquinolin-1(2H)-one, C22H18FNO3
  6. Crystal structure of the dinuclear copper(II) complex bis(μ2-2,2′ -{[1,3-phenylenebis-(methylene)]bis(oxy)}dibenzoaot-κ4O,O′:O′′,O′′′)-bis(dimethylformamide-κ1O)dicopper(II), C50H44Cu2N2O14
  7. Crystal structure of poly[triaqua-(μ9-biphenyl-3,3′,5,5′-tetracarboxylic-κ8 O,O:O,O′: O,O″:O,O‴)samarium(III)sodium(I)], C16H12NaSmO11
  8. The crystal structure of 5-benzyl-1-(4-fluorobenzyl)-4-((4-fluorobenzyl)oxy)-1,5-dihydro-2H-pyrrol-2-one, C25H21F2NO2
  9. The crystal structure of diammonium 2,5-dihydroxyterephthalate, C8H12N2O6
  10. Crystal structure of (E)-4-(4-(1H-1,2,4-triazol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[b]oxepin-5(2H)-one, C21H19N3O4
  11. Crystal structure of poly[oktakis(μ2-oxido-κ2O:O)-tetrakis(oxido-κ1O)-bis(μ2-1,1′-[1,4-phenylenebis(methylene)]di(1H-imidazole-κ2N:N′))-tetravanadium(V)-dizinc(II)] monohydrate, C28H30Zn2N8O13V4
  12. Crystal structure of acotiamide hydrochloride dimethylacetamide solvate (1/1), C25H40ClN5O6S
  13. Crystal structure of catena-poly[monoaqua (u2-(3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic-k4O:O′:O″:N)zinc(II))] monohydrate, C15H11NO10Zn
  14. Crystal structure of dichlorido{2,6-bis(3,5-diisopropyl-N-pyrazolyl)pyridine}zinc(II), C23H33Cl2N5Zn
  15. Crystal structure of nitrato-κ2O,O′-[hydridotris(3,5-diethylpyrazol-1-yl)borato-κ3N,N′,N″]copper(II), C21H34BCuN7O3
  16. Crystal structure of 2,7-bis(3,5-diethyl-1H-pyrazol-4-yl)-benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetrone, C28H26N6O4
  17. Crystal structure of 2-(4-chlorophenyl)benzothiazole, C13H8ClNS
  18. Synthesis and crystal structure (3R,4′S)-4′-(3,5-dibromophenyl)-1′-methyl-2H-dispiro [benzofuran-3,3′-pyrrolidine-2′,2″-indene]-1″,2,3″-trione, C26H17Br2NO4
  19. Crystal structure of bis(((3a,7a-dihydro-1H-benzo[d][1,2,3]triazol-1-yl)methyl) triphenylphosphonium) tetrachloridomanganate(II), C50H42Cl4MnN6P2
  20. The crystal structure of 4,9-bis(4-chlorophenyl)-1,6-bis(2-cyanobenzyl)-2,4a,5,6,7,7a-hexahydro-1H-2,7,5-(epiprop[2]ene[1,1,3]triyl)pyrrolo[3,4-b]pyridine-3,10-dicarbonitrile, C40H26Cl2N6
  21. The crystal structure of poly((μ2-3-(3-nitro-4-carboxylphenyl)benzoate-κ3O, O′:O″)-μ2-1,4-bis(1-imidazolyl)benzene-κ2N:N′-cadmium(II)), C26H17N5O6Cd
  22. The crystal structure of 6-hydroxy-5H-pyrrolo[3,4-b]pyridine-5,7(6H)-dione monohydrate, C7H6N2O4
  23. Crystal structure of 4-((cyclohexylsulfonyl)methyl)-1,2,3,4-tetrahydrobenzo [4,5]imidazo[1,2-a]pyridine, C18H24N2O2S
  24. Crystal structure of 4,7-diphenyl-1,10-phenanthroline-κ2N,N′)-bis(2,4-di(fluorine)-1-phenylpyridine-κ2C,N)-iridium(III) hexafluorophosphate–dichloromethane (1/1), C47H30Cl2F10IrN4P
  25. Crystal structure of (4-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)boronic acid, C19H15BN2O2
  26. The crystal structure of (E)-(2-((pyridin-2-ylmethylene)amino)phenyl)arsonic acid, C12H11AsN2O3
  27. The crystal structure of N(benzyl(phenyl)carbomothioyl)benzamide, C21H18N2OS
  28. The crystal structure of bis(2-picolinium) hexachlorostannate dichloromethane monosolvate, C13H18Cl8N2Sn
  29. Crystal structure of poly[tetraaqua-bis(μ4-3–1-(carboxylatomethyl)-1H-1,2,4-triazole-3-carboxylato)-κ4O:O′,O″,N)zinc(II)], C5H7N3O6Zn
  30. The crystal structure of the co-crystal isonicotinamide – 2-(nitrophenyl)methanol (1/1), C6H6N2O·C7H7NO3
  31. The crystal structure of 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 2-fluorobenzoate hydrate, C23H25F2N3O6
  32. Crystal structure of [diaqua-{1H-benzo[d]imidazol-3-ium-5,6-dicarboxylato-κ2O,O′}magnesium(II)] C18H14MgN4O10
  33. Crystal structure of (3-(dimethoxymethyl)-5-methoxy-1H-indol-1-yl) (2-iodo-5-methoxyphenyl)methanone, C20H20INO5
  34. The crystal structure of 3,7,11-trimethylbenzo[5,6][1,4]thiazino[2,3,4-kl]phenothiazine 5,5,9,9-tetraoxide, C21H17NO4S2
  35. Crystal structure of tris(piperazine-1,4-diium)bis(2-hydroxy-1,2,3-propane-tricarboxylate) pentahydrate, C24H56N6O19
  36. Crystal structure of 2-chloro-5-((5-isopropyl-2-methylphenoxy)methyl)pyridine, C16H18ClNO
  37. Crystal structure of (E)-4-(4-(1H-pyrrol-1-yl)benzylidene)-6,8-dimethoxy-3,4-dihydrobenzo[(b)]oxepin-5(2H)-one, C23H21NO4
  38. Crystal structure of (E)-N′-(3,4-dichlorobenzylidene)-3,4,5-trimethoxybenzohydrazide, C17H16Cl2N2O4
  39. The crystal structure of 2-(2-hydroxyphenyl)-3-(pyridin-2-yl)-2,3- dihydroquinazolin-4(1H)-one, C19H15N3O2
  40. Crystal structure of 5-hydroxy-2-(4-hydroxyphenyl)-7-methoxy-8-methylchroman-4-one, C17H16O5
  41. Crystal structure of bis[(3,4-dimethoxybenzyl)triphenylphosphonium]di-μ2-bromido-dibromidodicopper(I)
  42. Crystal structure of bis [(1,3-dioxolan-2-ylmethyl)triphenylphosphonium] tetrabromidodicopper(I), C22H22Br2CuO2P
  43. Crystal structure of [1-(4-carboxyphenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid], C12H8N2O5
  44. The crystal structure of one-dimensional cooridnation polymer bis(thiocyanato)-bis((1E,2E)-1,2-bis(1-(pyridin-3-yl)ethylidene)-hydrazine κ2N:N)iron(II), (C30H28N10S2Fe)n
  45. Crystal structure of ((4-acetamidophenyl)sulfonyl)-l-alanine, C11H14N2O5S
  46. Crystal structure of [(1-naphthalen-1-yl-methyl)triphenylphosphonium] dichloridocopper(I), [C29H24P]+[CuCl2]−
  47. RbTm3S5: the first rubidium lanthanoid(III) sulfide with CsEr3Se5-type crystal structure
  48. Crystal structure of 2,2′-((ethane-1,2-diylbis(methylammoniumdiyl))bis(methylene))bis(pyridin-1-ium) diiodido-tris(μ2-iodido-κ2I:I)dicopper(II) chloride dihydrate, C16H30Cu2I6N4O2
  49. The crystal structure of 4-(trifluoromethyl)pyridine-2-carboxylic acid, C7H4F3NO2
  50. The crystal structure of (E)-2-ethoxy-1-methoxy-4-(2-(methylsulfonyl)vinyl)benzene, C12H16O4S
  51. Crystal structure of potassium 1H,1H,2H,2H-perfluorooctanesulfonate, C8H4O3F13SK
  52. Crystal structure of 4-(4-(quinolin-8-yloxy)-1,2,5-thiadiazol-3-yl)morpholine, C15H14O2N4S
  53. The crystal structure of 1,4-bis(bromomethyl)-2,5-dimethylbenzene, C10H12Br2
  54. The crystal structure of imidazo[4,5-e][1,3]diazepine-4,6,8-triamine methanol solvate, C7H11N7O
  55. The crystal structure of chlorido-bis(1,10-phenantroline-κ2N,N′)-(2-formylphenoxyacetato-κ2O,O) lead(II), C33H23N4O4ClPb
  56. Crystal structure of pyridinium tetrakis(1,1,1-trifluoro-2,4-pentadionato-κ2O,O′)yttrium(III) C20F12H16YO8C5H6N
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