Tadalafil API Name Tadalafil Intermediate Name (1R,3R)-methyl 1-(benzo[d][1,3] dioxol -5-yl)-2-(2-chloroacetyl)- 2,3,4,9-tetrahydro- 1H-pyrido[ 3,4-b] indole- 3-carboxylate CAS No 171489-59-1 Contact Us