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:
... of the Indo-European[?] family. Nursitani languages, spoken in roughly what has become Afghanistan, are grouped with Vedic and Avestan.
The oldest form of Sanskrit is ...