(2016/11/28)
(2009/03/07)
(1S,3R,20S)-20-(4-triethylsilyloxy-4-methylpentanoyloxy)-1,3-bis(tert-butyldimethylsilyloxy)-9,10-secopregna-5Z,7E,10(19)-triene
(1S,3R,20S)-20-(5-triethylsilyloxy-5-ethylheptanoyloxy)-1,3-bis(t-butyldimethylsilyloxy)-9,10-secopregna-5Z,7E,10(19)-triene
(1S,3R,20S)-20-(5-hydroxy-5-ethylheptanoyloxy)-9,10-secopregna-5Z,7E,10(19)-triene-1,3-diol
(1S,3R,20S)-20-(4-hydroxy-4-methylpentanoyloxy)-9,10-secopregna-5Z,7E,10(19)-trien-1,3-diol