Noun
the penicillin that constitutes the principal component of many commercial antibiotics
Source: WordNetBiosynthesis Penicillin G biosynthesis Overall, there are three main and important steps to the biosynthesis of penicillin G (benzylpenicillin). Source: Internet
The isolation of 6-APA, the nucleus of penicillin, allowed for the preparation of semisynthetic penicillins, with various improvements over benzylpenicillin (bioavailability, spectrum, stability, tolerance). Source: Internet
Procaine penicillin and benzathine penicillin have the same antibacterial activity as benzylpenicillin but act for a longer period of time. Source: Internet