(E)-(1aS,3aR,6bR)-1-oxo-5-[2-oxo-1-(4-hydroxyphenyl)-pyrrolidin-3-ylidenemethyl]-1a,2,3,3a,4,6b-hexahydro-1H-2,6a-diaza-cyclobut[cd]indene-6-carboxylic acid trifluoroacetate 、
乙酰氯 在
碳酸氢钠 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 (E)-(1aS,3aR,6bR)-2-acetyl-1-oxo-5-[2-oxo-1-(4-hydroxyphenyl)-pyrrolidin-3-ylidenemethyl]-1a,2,3,3a,4,6b-hexahydro-1H-2,6a-diaza-cyclobut[cd]indene-6-carboxylic acid sodium salt