. "(6R,12aR)-6-Benzo[1,3]dioxol-5-yl-2-methyl-2,3,6,6a,7,11b,12,12a-octahydro-pyrazino[1'',2'':1,6]pyrido[3,4-b]indole-1,4-dione" . "Tadalafil" . . . . . . . . .