Mometasone Impurity 4

Chemical Name: 2-((4aS,4bS,5aS,6aS,7R,8R)-7-hydroxy-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)-2-oxoethyl furan-2-carboxylate

Smile: O=C1C=C[C@@]2(C)C(CCC3[C@@]24[C@@H](O4)C[C@@]5(C)C3C[C@H]([C@@]5(C(COC(C6=CC=CO6)=O)=O)O)C)=C1