(-)-Hexahydro-2-imino-1H-1,3-diazepine-4-carboxylic acid isopropyl ester hydrochloride 1H-1,3-Diazepine-4-carboxylic acid, hexahydro-2-imino-, isopropyl ester, monohydrochloride, (-)- 26281-64-1 OG 90