Drospirenone Lactol Impurity

Chemical Name: (2'S,6R,7R,8R,9S,10R,13S,14S,15S,16S)-1,4',5',6,7,8,9,10,11,12,13,14,15,16,20,21-Hexadecahydro-5'-hydroxy-10,13-dimethyl-spiro[17H-dicyclopropa[6,7:15,16]cyclopenta[a]phenanthrene-17,2'(3'H)-furan]-3(2H)-one

Smile: O=C1CC[C@@]2(C)C([C@H](C3)[C@H]3[C@]4([H])[C@]2([H])CC[C@@]5(C)[C@@]4([H])[C@H](C6)[C@H]6[C@]57OC(O)CC7)=C1