倍他米松杂质1
QY-BTMS-01
2-oxo-2-((4aS,4bR,5aR,6aS,9aS)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,9,9a,9b,10,11-decahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl)ethyl acetate