Category: Active Pharmaceutical Ingredient ( API) CAS No: [ 61-25-6] Chemical Name: 1-[ ( 3, 4-Dimethoxybenzyl) ] , - 6, 7-dimethoxyisoquinoline hydrochloride Pharmacopoeial Reference: Ph.Eur / B.P / I.P Molecular Weight: 375.9 Molecular Formula: C20H21NO4-HCl