2-(β-carboxyethyl)-3-methyl-5-methoxybenzo[b]furan

cis-1-oxo-3a-hydroxy-7-methoxy-8b-methyl-2,3,3a,8b-tetrahydro-1H-cyclopenta[b]benzo[b]furan

2-methyl-2-(2-acetoxy-5-methoxyphenyl)cyclopentane-1,3-dione

2-甲基-1,3-环戊二酮

乙基4-环己基-4-氧代丁酸酯