(3,4-DIETHOXYPHENYL)METHYLENE]-6,7-DIETHOXY 1,2,3,4-TETRAHYDROISOQUINOLINE HCL; 6,7,3',4'-tetraethoxy-1-benzal-1,2,3,4-tetrahydroisoquinoline hydrochloride; dihydroisoperparine; Drotaverin; Drotaverina [INN-Spanish]; DROTAVERINE; Drotaverine [INN]; DROTAVERINE HCL; Drotaverinum [...