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. Choline Chemische naam: Choline (engels: Choline) Molecuul formule: C5H14NO Traditionele structuurformule. 3D-ball & stick structuurformule. De PDB file getoont met Chime.