(E)-(4R,5R,6S)-6-(4-Methoxy-bicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)-6-(2-methoxy-ethoxymethoxy)-2,4-dimethyl-1-phenylsulfanyl-5-trimethylsilanyloxy-hex-1-en-3-one 以87%的产率得到(2S,3S,4R,4aS,10S,10aR)-6-Methoxy-4-(2-methoxy-ethoxymethoxy)-2,10a-dimethyl-10-phenylsulfanyl-3-trimethylsilanyloxy-3,4,4a,9,10,10a-hexahydro-2H-phenanthren-1-one