Back to the overview of different vitamins When you can not open the PDB files you probably have not the free plug-in Chime. You can download Chime, after registration, free of charge by clicking here. Vitamine B2 Chemische naam: Riboflavine, Lactoflavine of E101 (engels: Riboflavin) Molecuul formule: C17H20O6N4 Traditionele structuurformule. 3D-ball & stick structuurformule. De PDB file getoont met Chime.