1.
Chem Commun (Camb)
; (21): 2204-5, 2001 Nov 07.
Article
in English
| MEDLINE
| ID: mdl-12240112
ABSTRACT
A monoclinic centrosymmetric form of zopiclone dihydrate undergoes a sequential, two-step transformation in the solid-state upon heating which results in separation of the enantiomers into a racemic conglomerate or racemic twins.
2.
Acta Crystallogr C
; 56 Pt 11: 1372-3, 2000 Nov.
Article
in English
| MEDLINE
| ID: mdl-11077303
ABSTRACT
The antibiotic norfloxacin recrystallizes from acetonitrile as a dihydrate with the norfloxacin molecule in a zwitterionic form, i.e. 1-ethyl-6-fluoro-1, 4-dihydro-4-oxo-7-(1-piperazin-4-io)-3-quinolinecarboxylate dihydrate, C(16)H(18)FN(3)O(3).2H(2)O.