Spiro(17H-dicyclopropa(6,7:15,16)cyclopenta(a)phenanthrene-17,2'(5'H)-furan)-3,5'(10H)-dione, 3',4',6,7,8,9,11,12,13,14,15,16,20,21-tetradecahydro-10,13-dimethyl-, (6R-(6alpha,7alpha,8beta,9alpha,10beta,13beta,14alpha,15alpha,16alpha,17beta))-