Inquiring about:
5-[3-[1-[(3,4-dimethoxyphenyl)methyl]-6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl]propanoyloxy]pentyl 3-[1-[(3,4-dimethoxyphenyl)methyl]-6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl]propanoate;oxalic acid (CAS: 64228-78-0)