3-((1S,2S,4aR,4bS,6aR,9R,10S,10aR,12aR)-1,4a,4b,6a,9,10-六甲基-2-(丙-1-烯-2-基)-1,2,3,4,4a,4b,5,6,6a,7,8,9,10,10a,12,12a-十六氢䓛-1-基)丙酸 6812-81-3