In organic chemistry, a pyrrole is a five membered aromatic ring, 4 elements of which are carbonatoms, one element of which is a nitrogen atom. The molecular formula for a pyrrole is C4NH5. The structure is:
... and how
to resist it, reflections about death and the judgment,
meditations upon the oblation of Christ, and
admonitions to flee the vanities of the world.
Christ ...