(2S)-2-((7aR,E)-4-(((4S,6R)-4,6-Bis((tert-butyldimethylsilyl)oxy)-2,2-dioxido-1,3,4,5,6,7-hexahydrobenzo[c]thiophen-1-yl)methylene)-7a-methyloctahydro-1H-inden-1-yl)propyl 4-Methylbenzenesulfonate is an intermediate in the synthesis of 24-Homo Calcitriol (H589800), analog with potent effects on cell growth regulation and immune responses.