6-Ethoxy-3-(6-hydroxy-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl)-hexanoic acid tert-butyl ester 在
potassium carbonate 作用下,
生成 (+/-)-6-[[4-(aminoiminomethyl)phenyl]methoxy]-β-(3-ethoxypropyl)-3,4-dihydro-1-oxo-2(1H)-isoquinolinepropanoic acid trifluoroacetate