vitamin b2 CAS No.:83-88-5 Empirical formula:C17H20N4O6 Appearance:oringe yellow powder Riboflavin ... , flavin, flavine, lactoflavin, riboflavine, vitamin B2, vitamin G.CAS NO: 83-88-5Molecular Structure: Molecular Formula: C17H20N4O6 Molecular Weight: 376.37Quality ...