2-[2-(tert-Butoxycarbonyl-methyl-amino)-3-(4-hydroxy-8-methoxy-1-vinyl-3,4-dihydro-1H-isoquinolin-2-yl)-3-oxo-propyl]-2-dimethoxymethyl-malonic acid dimethyl ester 以83%的产率得到Dimethyl 2-(dimethoxymethyl)-2-[3-(1-ethenyl-8-methoxy-4-oxo-1,3-dihydroisoquinolin-2-yl)-2-[methyl-[(2-methylpropan-2-yl)oxycarbonyl]amino]-3-oxopropyl]propanedioate