| tackle short suration | penicillin G procaine | penicillin G benzathine | ||
| tackle acid sensitivity | penicillin V | phenethicillin | propicillin | phenpencillin |
| tackle bacterial resistance | methicillin | nafcillin | isoxazolyl penicillins {anti staphylococcal} | bulky subst at position 6 Temocillin |
| aminopenicillins | ampicillin | Amoxacillin | ampicillin prodrugs | |
| hetacillin | sarcillin | epicillin | cyclacillin | |
| carbencillins | carbencillin | ticarcillin | sulbencillin | suncillin |
| ureidopenicillins | Azlocillin | Mezlocillin | piperacillin | |
| amidinopenicillin | Mecillinam | |||
| B lactamase inhibitor | clavulanic acid | sulbactam | Tazobactam | sultamicillin |