2-tert-Butyl 4-methyl 3,5-dimethyl-1H-pyrrole-2,4-dicarboxyl-ate.
In the title mol-ecule, C(13)H(19)NO(4), except for two C atoms of the tert-butyl group, the non-H atoms are almost coplanar (r.m.s. deviation = 0.2542 Å). In the crystal, mol-ecules are linked into centrosymmetric dimers by two inter-molecular N-H⋯O hydrogen bonds, forming an R(2) (2)(10) ring motif.
Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000,  People's Republic of China.
Hong-Xin
HX
Cai
Zhao-Po
ZP
Zhang