英文别名(1R,3AR,7aR)-1-((2R,5R,E)-5,6-dimethylhept-3-en-2-yl)-7a-methyloctahydro-4H-inden-4-one; (1R,3aR,7aR)-Octahydro-7a-Methyl-1-[(1R,2E,4R)-1,4,5-triMethyl-2-hexen-1-yl]-4H-inden-4-one; [1R-[1α(1R*,2E,4R*),3aβ,7aα]]-Octahydro-7a-Methyl-1-(1,4,5-triMethyl-2-hexenyl)-4H-inden-4-one; (1R,3aR,7aR)-1-((2R,5R,E)-5,6-diMethylhept-3-en-2-yl)-7a-Methylhexahydro-1H-inden-4(2H)-one; (1R,3aR,7aR)-1-[(E,2R,5R)-5,6-dimethylhept-3-en-2-yl]-7a-methyl-2,3,3a,5,6,7-hexahydro-1H-inden-4-one; Ergocalciferol (Vitamin D2) Impurity 1 (Windaus Ketone); 4H-Inden-4-one, octahydro-7a-methyl-1-[(1R,2E,4R)-1,4,5-trimethyl-2-hexen-1-yl]-, (1R,3aR,7aR)- 
