Complex sentence: Thiazole, or 1,3-thiazole, is a clear to pale yellow flammable liquid with a pyridine-like odor and the molecular formula C 3 H 3 NS.
Split into simpler sentences: Thiazole, or 1,3-thiazole, is a heterocyclic compound that contains both sulfur and nitrogen. Thiazole itself is a pale yellow liquid with a pyridine-like odor and the molecular formula C 3 H 3 NS.