Complex sentence: Bipyridine is one of the most simple polypyridine compounds in which two pyridine molecules are bound with a single bond, and its molecular formula is C 10 H 8 N 2.
Split into simpler sentences: Bipyridine is one of the most simple polypyridine compounds. It consists of two pyridine molecules bound with a single bond, and its molecular formula is C 10 H 8 N 2.