p. 3479 - 3486
(2007/10/03)5-(2-ethoxycarbonyl-ethyl)-pyrrole-2-carboxylic acid ethyl ester
2-ethoxycarbonyl-5-(2'-ethoxycarbonylethyl)-1-methylpyrrolidine
ethyl 5-(3-ethoxy-3-oxopropyl)pyrrolidine-2-carboxylate
3-ethoxycarbonyl-8-methyl-8-azabicyclo[3.2.1]octan-2-one
ethyl 1H-pyrrole-2-carboxylate