(1aS,3aR,6bR)-5-[(4-hydroxy-benzyl)-carbamoyloxymethyl]-1-oxo-1a,2,3,3a,4,6b-hexahydro-1H-2,6a-diazacyclobut[cd]indene-6-carboxylic acid trifluoroacetate 以
N-甲基乙酰胺 为溶剂,
生成
(1aS,3aR,6bR)-2-Acetyl-5-[(4-hydroxy-benzyl)-carbamoyloxymethyl]-1-oxo-1a,2,3,3a,4,6b-hexahydro-1H-2,6a-diazacyclobut[cd]indene-6-carboxylic acid sodium salt