Xlm. Despinoy et al., THE EFFECT OF 3-SUBSTITUTION ON THE STRUCTURES OF PYRROLE-2-CARBALDEHYDES, Acta crystallographica. Section C, Crystal structure communications, 54, 1998, pp. 231-233
In the title compounds, methyl 2-formylpyrrole-3-carboxylate, C7H7NO3,
and 3-methoxypyrrole-2-carbaldehyde, C6H7NO2, the pyrrole rings show
little distortion ascribable to the electronic properties of the subst
ituents, whether they are electron donating or electron withdrawing.