6,7,3',4'-Tetraethoxy-1-benzal-1,2,3,4-tetrahydroisoquinoline-theophylline-7-acetate 61954-97-0 7H-Purine-7-acetic acid, 1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-, compd. with 1-((3,4-diethoxyphenyl)methyl)-6,7-diethoxy-3,4-dihydroisoquinoline (1:1) Depogen Drotaverine acephyllinate