倍他米松杂质3
QY-BTMS-03
(4aS,4bS,5aS,6aS,7R,8S,9aS)-7-(2-acetoxyacetyl)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl propionate