摘要:
Cephalexin is purified by allowing it to precipitate as a sparingly soluble salt with a base such as a nitrogen-containing heterocyclic compound (e.g. quinoline, isoquinoline) or an aniline or naphthylamine compound (e.g. dichloroaniline, Alpha naphthylamine), separating the salt and decomposing the salt.
摘要:
Crystalline cytidine-5''-diphosphate choline monohydrate is produced by A. ADDING A HYDROPHILIC ORGANIC SOLVENT TO AN AQUEOUS SOLUTION SYSTEM OF CYTIDINE-5''-DIPHOSPHATE CHOLINE IN THE PH range of from about 2 to about 4, or B. KEEPING CYTIDINE-5''-DIPHOSPHATE CHOLINE STANDING AT A RELATIVE HUMIDITY OF NOT LESS THAN ABOUT 32 PERCENT AND AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 17*C to about 70*C for not shorter than about 5 days.