Drospirenone Impurity 7(Drospirenone Ether Impurity)

(2’S,4aR,4bS,6aS,7aS,8aS,8bS,8cR,8dR,9aR)-4a,6a-dimethyl-4,4a,4b,4′,5,5′,6,6a,7a,8,8a,8b,8c,8d,9,9a-hexadecahydro-3’H-spiro[cyclopropa[4,5]cyclopenta[1,2-a]cyclopropa[l]phenanthrene-7,2′-furan]-2(3H)-one