4,5-dihydro-5-methyl-3-(phenylsulfonyl)-2(3H)-furanone

trans-3-pentenamide

4-(tert-butyldimethylsilyloxy)-1-(pyrrolidin-1-yl)pentan-1-one

(S)-4-methyl-β-butyrolactone

N-甲基]戊酰胺