甲醇

莽草酸

methyl (3aR,7R,7aS)-7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate

(1R,2S,3R)-5-(methoxycarbonyl)cyclohex-4-ene-1,2,3-triyl triacetate

(3aR,7R,7aR)-methyl 7-((tert-butyldimethylsilyl)oxy)-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate