2-(3,4-dimethoxyphenyl)-3-{{[(3,4-dimethoxyphenyl)methyl]carbonyl}amino}propanoic acid methyl ester 、 3,4-Dihydro-6,7-dimethoxy-1-[(3,4-dimethoxyphenyl)methyl]-4-isoquinolinecarboxylic acid ethyl ester hydrochloride 在
3,4-dihydro-6,7-dimethoxy-1-[(3,4-dimethoxyphenyl)methyl]-4-isoquinoline carboxylic acid methyl ester, hydrochloride 、
甲醇 作用下,
以provided analytically pure 3,4-dihydro-6,7-dimethoxy-1-[(3,4-dimethoxyphenyl)methyl]-4-isoquinolinecarboxylic acid methyl ester, hydrochloride, mp 199°-200°的产率得到3,4-dihydro-6,7-dimethoxy-1-[(3,4-dimethoxyphenyl)methyl]-4-isoquinoline carboxylic acid methyl ester, hydrochloride