1,2-Pyrrolidinedicarboxylic acid, 1-benzyl 2-(1,2-dibromoethyl) ester 1,2-Pyrrolidinedicarboxylic acid, 2-(1,2-dibromoethyl) 1-(phenylmethyl) ester 64187-33-3 BRN 0439986 N-Carbobenzoxy-L-proline 1,2-dibromoethyl ester