<Ul> <Li> Methicillin </Li> <Li> Nafcillin </Li> <Li> Oxacillin </Li> <Li> Cloxacillin </Li> <Li> Dicloxacillin </Li> <Li> Flucloxacillin </Li> </Ul> <Ul> <Li> Ampicillin </Li> <Li> Amoxicillin </Li> <Li> Pivampicillin </Li> <Li> Hetacillin </Li> <Li> Bacampicillin </Li> <Li> Metampicillin </Li> <Li> Talampicillin </Li> <Li> Epicillin </Li> </Ul> <Ul> <Li> Carbenicillin </Li> <Li> Ticarcillin </Li> <Li> Temocillin </Li> </Ul> <Ul> <Li> Mezlocillin </Li> <Li> Piperacillin </Li> </Ul>

When was penicillin first used commercially as an antibiotic