Prednisolone Epoxide-Triene Impurity

Chemical Name: (4aS,4bS,5aS,6aS)-7-(2-hydroxyacetyl)-4a,6a-dimethyl-5a,6,6a,9,9a,9b,10,11-octahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-2(4aH)-one ; 9 β,11 β -epoxide-21-hydroxy pregna-1,4,16-triene-3,20-dione

Smile: O=C1C=C[C@@]([C@]2(O3)[C@@H]3C[C@@](C(C(CO)=O)=CC4)(C)C4C2CC5)(C)C5=C1