title: Dimethyl 3,5-diethyl-1H-pyrrole-2,4-dicarboxyl-ate.
abstract: The title pyrrole derivative, C(12)H(17)NO(4), consists of a pyrrole ring with two diagonally attached meth-oxy-carbonyl groups and two diagonally attached ethyl groups. The two carbonyl groups are approximately in the same plane as the pyrrole ring, making dihedral angles of 3.50 (19) and 6.70 (19)°. In the crystal, adjacent mol-ecules are assembled into dimers in a head-to-head mode by pairs of inter-molecular N-H⋯O hydrogen bonds.
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013,  People's Republic of China.
authors.forename: Gui-Fen
authors.initials: GF
authors.lastname: Lu
authors.forename: Wen-Sheng
authors.initials: WS
authors.lastname: Lin
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Zhu
authors.forename: Zhong-Ping
authors.initials: ZP
authors.lastname: Ou
references.citation: Org Lett. 2001 Feb 8;3(3):421-4
references.pmid: 11428029
references.citation: Inorg Chem. 2001 Sep 10;40(19):4845-55
references.pmid: 11531430
references.citation: Chem Rev. 2008 Jan;108(1):264-87
references.pmid: 18095718
references.citation: Chem Rev. 2004 May;104(5):2481-506
references.pmid: 15137797
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677