Betamethasone Impurity 13

Chemical Name: 2-oxo-2-((4aS,4bS,5aS,6aS,9aS,9bS)-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 propionate

Smile: CCC(OCC(C1=C(C)C[C@]2([H])[C@]1(C)C[C@]3([H])O[C@@]34[C@@]5(C)C=CC(C=C5CC[C@@]24[H])=O)=O)=O