N-乙酰-L-4-羟基脯氨酸

methyl 1-acetyl-trans-4-hydroxy-L-proplinate

N-acetyl-trans-4-(tosyloxy)-L-proline

(3R,5S)-5-(methoxycarbonyl)-1-acetylpyrrolidin-3-yl 4-methylbenzenesulfonate