6-(2-oxo-2,3-dihydro-1H-imidazol-4-yl)-hexanoic acid

乙基5-碘戊酸酯

2-tert-butoxycarbonylaminoacetyl-heptanedioic acid 7-ethyl ester 1-methyl ester

6-(2-oxo-imidazolidin-4-yl)hexanoic acid methyl ester

6-氯-6-氧代己酸乙酯