p. 1855 - 1859
(1997)p. 6673 - 6676
(2007/10/02)N-phenylsulphonyl-4-exomethylene-(S)-proline benzylester
(S)-4-methylene-pyrrolidine-1,2-dicarboxylic acid 2-benzyl ester 1-tert-butyl ester
(S)-1-tert-butyl 2-methyl 4-methylenepyrrolidine-1,2-dicarboxylate
N-phenylsulphonyl-N-propargyl-O-tetrahydropyranyl-(S)-serine benzylester
N-phenylsulphonyl-N-propargyl-3-bromo-(S)-alanine benzylester