113-98-4 (MONOPOTASSIUM SALT) 1538-09-6 (BENZATHINE SALT) 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]- (2S,5R,6R)- 41372-02-5 (BENZATHINE SALT, TETRAHYDRATE) 61-33-6 (FREE ACID) AIDS-043803 AIDS043803 Benzylpenicillin Bicillin (*Benzathine Salt, Tetrahydrate*) Penicillin Penicillin G Penicillin-G potassium