Butyl 1-((R,E)-4-((1R,3aS,7aR,E)-4-((Z)-2-((3S,5R)-3,5-Bis((tert-butyldimethylsilyl)oxy)-2-methylenecyclohexylidene)ethylidene)-7a-methyloctahydro-1H-inden-1-yl)pent-2-enoyl)cyclopropanecarboxylate is an intermediate in synthesizing ZK 159222 (Z485800), a vitamin D receptor antagonist. It is a derivative of Vitamin D3 (V676045).
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