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 Isabella I of Castile and of Maximilian I, Holy Roman Emperor.
Charles was born in Ghent and brought up in the Netherlands until 1517, where he was tutored by ...