1.Vitamin B2 2.Excellent quality 3.Delivery quick 4.Competitive price Vitamin B2 Chemical Name: 7,8-Dimethyl-10-[(2S,3S,4R)-2,3 ... ,4,5-tetrahydroxypentyl]benzo[g]pteridine-2,4(3H ... .Period of validity: In an airtight container,Three years Vitamin B2