(3RS)-(6,7-dimethoxy-3-methyl-3,4-dihydro-2H-isoquinolin-1-ylidene)-acetic acid methyl ester 、
硝基乙烷 、
3,5-二甲基-4-羟基苯甲醛 生成 (5RS)-(4-hydroxy-3,5-dimethyl-phenyl)-8,9-dimethoxy-3,5-dimethyl-5,6-dihydro-pyrrolo[2,1-a]isoquinoline-1-carboxylic acid methyl ester