4-22-00-03003 (Beilstein Handbook Reference) 5-Acetyl-2,4-dimethyl-pyrrole-3-carboxylic acid ethyl ester 6314-22-3 BRN 0160846 NSC 40232 NSC 63924 PYRROLE-3-CARBOXYLIC ACID, 5-ACETYL-2,4-DIMETHYL-, ETHYL ESTER