Di-tert-butyl 3,5-dimethyl-1H-pyrrole-2,4-dicarboxyl-ate.
In the title mol-ecule, C(16)H(25)NO(4), the non-H atoms, except for the two tert-butyl groups, are roughly planar (r.m.s. deviation of the non-H atoms = 0.086 Å). In the crystal, mol-ecules are linked into inversion dimers by pairs of N-H⋯O hydrogen bonds, forming R(2) (2)(10) ring motifs.
Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000,  People's Republic of China.
Zhao-Po
ZP
Zhang
Wei-Na
WN
Wu