1-(tert-butoxycarbonylamino-methyl)-6,7-dimethoxy-isoquinoline-4-carboxylic acid 、
N-甲基苄胺 以to give 82 mgs (8%) of [4-(benzyl-methyl-carbamoyl)-6,7-dimethoxy-isoquinolin-1-ylmethyl]-carbamic acid tert-butyl ester的产率得到[4-(benzyl-methyl-carbamoyl)-6,7-dimethoxy-isoquinolin-1-ylmethyl]-carbamic acid tert-butyl ester