(S)-3-((Z)-2-((1R,3aR,7aR)-1-((2R,5R,E)-5,6-Dimethylhept-3-en-2-yl)-7a-methyl-2,3,3a,6,7,7a-hexahydro-1H-inden-4-yl)vinyl)-4-methylcyclohex-3-en-1-ol

(The order shall be subject to the English name)

English alias：previtamin D; Praevitamin; (3S)-9,10-seco-ergosta-5(10),6c,8,22t-tetraen-3-ol; (3aR)-3ar-Methyl-7-[2c-((S)-5-hydroxy-2-methyl-cyclohexen-(1)-yl)-vinyl-(1r)]-3c-((1R:4R)-1.4.5-trimethyl-hexen-(2t)-yl)-(7atH)-3a.4.5.7a-tetrahydro-indan; 9.10-Seco-ergostatetraen-(5(10).6c.8.22t)-ol-(3β); Praevitamin-D2;
CAS：21307-05-1 Molecular formula：C₂₈H₄₄O Molecular weight：396.65