S-3-<3',17'β-bis-(t-butyldimethylsilyl)oxy-estra-1',3',5'(10')-trien-11'α-yl>oxypropyl ethanethioate

bis-3-<17'β-(t-butyldimethylsilyl)oxy-3'-hydroxy-estra-1',3',5'(10')-trien-11'α-yl>oxypropyl-disulfane

bis-3-<3',17'β-bis(t-butyldimethylsilyl)oxy-estra-1',3',5'(10')-trien-11'α-yl>oxypropyl-disulfane