The chemical Penicillin V Potassium has a designated molecular formula of C16H17KN2O5S and a molecular weight of 388.479 g/mol. Synonyms may include: Antibiocin, Apsin VK, Arcacil, Arcasin, Aspin VK, Beepen-VK, Beromycin, Beromycin (penicillin), Betapen-VK, Calciopen K, CCRIS 750, V-Cil-K (ChemID). Penicillin V Potassium has been assigned a MeSH pharmacological action of: Antibacterial.