58-74-2 6,7-Dimethoxy-1-(3,4-dimethoxybenzyl)isoquinoline 6,7-Dimethoxy-1-veratrylisoquinoline Cerespan HSDB 3147 Isoquinoline, 6,7-dimethoxy-1-veratryl-(8Cl) NSC 136630 Papanerin Papanerine Papaverin Pavabid Pavacot Robaxapap isoquinoline, 1-[(3,4-dimethoxyphenyl)methyl]-6,7-dimethoxy-