英文别名Tadalafil Impurity 111; 2,5-Piperazinedione, 3-[[2-(1,3-benzodioxol-5-ylcarbonyl)-1H-indol-3-yl]methyl]-1-methyl-, (3R)-; 3-[[2-(1,3-benzodioxole-5-carbonyl)-1H-indol-3-yl]methyl]-1-methylpiperazine-2,5-dione; (R)-3-((2-(benzo[d][1,3]dioxol-5-carbonyl)-1H-indol-3-yl)methyl)-1-methylpiperazine-2,5-dione 
