structural chemical molecular formula and model of ergocalciferol and cholecalciferol. atoms are represented as spheres

acid and are atom atomic atoms beauty biochemistry biology bond c27h44o c28h44o calcidol calciferol chemical chemistry cholecalciferol coding colecalciferol color complex compound dietary drisdol education element ergocalciferol essential flat formula health icon illustration immunity infographic medicine model molecular molecule multi nutrient nutrition organic pharmacology pharmacy pill poster represented science spheres structural structure supplement vector visualization vitamin