马斯里酸甲酯

methyl 2α-tosyloxy-3β-hydroxy-12-oleanen-28-oate

methyl (4aS,6aS,6bR,8aR,9aR,12aR,13aR,13bR,15bS)-2,2,6a,6b,9,9,13a-heptamethyl-1,3,4,5,6,6a,6b,7,8,8a,9,9a,12a,13,13a,13b,14,15b-octadecahydropiceno[2,3-d][1,3,2]dioxathiole-4a(2H)-carboxylate 11,11-dioxide

1-oxo-2-methylheptafluoro-1,4-dihydronapthalene

methyl (4aS,6aR,6aS,6bR,8aR,9R,10S,12aR,14bS)-10-hydroxy-9-(hydroxymethyl)-2,2,6a,6b,9,12a-hexamethyl-1,3,4,5,6,6a,7,8,8a,10,11,12,13,14b-tetradecahydropicene-4a-carboxylate