Crystals of pyridonecarboxylic acid derivative

Details Crystals of pyridonecarboxylic acid derivative Crystals of pyridonecarboxylic acid derivative

C - Chemistry, Metallurgy

07

D

C07D 401/04 (2006.01) A61K 31/47 (2006.01)

Patent

CA 2131761

A method for selectively obtaining any one of an anhydrate, a 1/2 hydrate, a 1 hydrate, and a 3/2 hydrate of 7-[(7-(S)-amino-5-azaspiro[2.4]heptan-5-yl]-8-chloro-6- fluoro-1-[(1R,2S)-2-fluorocyclopropyl]-4-oxo-1,4- dihydroquinoline-3-carboxylic acid represented by formula (I) : Image is disclosed, comprising treating the compound in an aqueous solvent or water or recrystallizing the compound from an aqueous solvent or water.

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