Riboflavin-13C,15N2 Synonym: (-)-Riboflavin-13C,15N2 6 ,7-Dimethyl-9-D-ribitylisoalloxazine-13C,15N2 Beflavin-13C,15N2 Beflavine-13C,15N2 Flavaxin-13C,15N2 Flavin BB-13C,15N2 Flaxain-13C,15N2 Hyre-13C,15N2 Lactobene-13C,15N2 Lactoflavin-13C, 1 * 1 mg