Passage: 2,6-Lutidine is a natural heterocyclic aromatic organic compound with the formula (CH3)2C5H3N.  It is one of several dimethyl-substituted derivative of pyridine.  It is a colorless liquid with mildly basic properties and a pungent, noxious odor.

Question: What is it's formula?
(CH3)2C5H3N