(4aR,4bR,6aS,7S,9aR)-4a,6a-Dimethyl-7-(2-methyl-1,3-dioxolan-2-yl)-12-phenyl-4,4a,4b,5,6,6a,7,8,9,9a-decahydro-1H-spiro[9b,14a-ethenobenzo[c]cyclopenta[h][1,2,4]triazolo[1,2-a]cinnoline-2,2'-[1,3]dioxolane]-11,13(3H,12H)-dione is an intermediate in the synthesis of 3,20-Bis(ethylenedioxy)pregna-5,7-diene (B433805), which is the 3,20-bis(ethylenedioxy) analog of Ergosterol (E599240); the most important provitamin D usually obtained from yeast that synthesize it from simple sugars such as glucose.
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