(1R,4S)-2-氧代-7-氮杂双环[2.2.1]庚烷-7-羧酸叔丁酯

(1S,3R,4R)-3-Carboxymethyl-7-aza-bicyclo[2.2.1]heptane-1,7-dicarboxylic acid 7-benzyl ester 1-tert-butyl ester

(1S,3S,4R)-3-(2-Hydroxy-ethyl)-7-aza-bicyclo[2.2.1]heptane-1,7-dicarboxylic acid 7-benzyl ester 1-tert-butyl ester

(1S,3S,4R)-3-Carboxymethyl-7-aza-bicyclo[2.2.1]heptane-1,7-dicarboxylic acid 7-benzyl ester 1-tert-butyl ester

(1S,3R,4R)-3-Methoxycarbonylmethyl-7-aza-bicyclo[2.2.1]heptane-1,7-dicarboxylic acid 7-benzyl ester 1-tert-butyl ester