p. 455 - 457
(1991)(2S,3S)-3-Propyl-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester
(S)-1-tert-butyl 2-methyl 4-oxopyrrolidine-1,2-dicarboxylate
N-<(tert-butyloxy)carbonyl>-3-n-propylproline methyl ester
N-<(tert-butyloxy)carbonyl>-trans-3-n-propylproline
(2S,3S)-3-Allyl-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester