英文别名oxa019; Tadalafil EP Impurity; Tadalafil Impurity; Tadalafil impurity 10/(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-6,7,12,12a-tetrahydro-1H-[1,4]oxazino[4',3':1,6]pyrido[3,4-b]indole-1,4(3H)-dione; Tadalafil-010-1R3R; Tadalafil-010-RR; Tadalafil Impurity 25; Tadalafil IMP; (6R,12aR)-6-(benzo[d][1,3]dioxol-5-yl)-6,7,12,12a-tetrahydro-1H-[1,4]oxazino[4',3':1,6]pyrido[3,4-b]indole-1,4(3H)-dione 
