1-(3',4'-dimethoxybenzyl)-6,7-dimethoxy-2-(N-methylacetamido)-1,2,3,4-tetrahydroisoquinoline

tetrahydropapaverine hydrobromide

N-acetamidopapaverinium iodide

N-aminopapaverinium mesitylenesulphate

(S)-1-((R)-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-1-yl)ethane-1,2-diol