Definition: A group of antibiotics that contain 6-aminopenicillanic acid with a side chain attached to the 6-amino group. The penicillin nucleus is the chief structural requirement for biological activity. The side-chain structure determines many of the antibacterial and pharmacological characteristics. (Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed, p1065)
check text for a specific if possible
Other names Antibiotics, Penicillin; Penicillin Antibiotics; Penicillin
temocillin [ BRL 17421,disodium 6beta-(2-carboxy-2-thien-3-ylacetamido)-6alpha-methoxypenicillanate,temocillin, (2S-(2alpha,5alpha,6alpha))-isomer ] beta-lactam antibiotic with unusual spectrum of antibacterial activity & exceptional stability to bacterial beta-lactamases; RN given refers to di-Na salt (2S-(2alpha,5alpha,6alpha))-isomer; structure