Pyrrole is a heterocyclic, organic compound the molecules of which contain
a ring of four carbon atoms and one nitrogen.
Its chemical formula is C4H5N. Pyrrole is colorless
liquid that smells like chloroform. Many
natural coloring materials are derived from pyrrole, including chlorophyll and hemoglobin.
|Ball-and-stick model of a pyrrole molecule. Black
= carbon, blue = nitrogen, white = hydrogen