2-甲基-3-氧代戊酸甲酯

methyl 2,5-dimethyl-3-oxohexanoate

methyl 2-(4-(morpholin-4-yl)-1,2,5-thiadiazol-3-yl)propanoate

2-甲基-辛酸甲酯

methyl 2,4-dimethylpentanoate