p. 2697 - 2716
(1997)p. 3603 - 3615
(1997)4-(3-hydroxypropyl)-3,5-dimethyl-4-(3-oxopropyl)-1H-pyrrole-2-carboxylic acid ethyl ester
p-toluenesulfonyl chloride
ethyl 5-(ethoxycarbonyl)-2,4-dimethyl-1H-pyrrole-3-propanoate
4-(2-carboxyethyl)-3,5-dimethyl-1H-pyrrole-2-carboxylic acid ethyl ester