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β-Lactam antibiotics (beta-lactam antibiotics) are antibiotics that contain a β-lactam ring in their chemical structure. This includes penicillin derivatives ( penams ), cephalosporins and cephamycins ( cephems ), monobactams , carbapenems [ 1 ] and carbacephems . [ 2 ]
The β-lactam core structures. (A) A penam.(B) A carbapenam.(C) An oxapenam.(D) A penem.(E) A carbapenem.(F) A monobactam.(G) A cephem.(H) A carbacephem.(I) An oxacephem. This is a list of common β-lactam antibiotics—both administered drugs and those not in clinical use—organized by structural class.
6-Aminopenicillanic acid (6-APA) is a compound derived from penicillin G. 6-APA contains the beta-lactam core of penicillin G, but with the side chains stripped off; 6-APA is a useful precursor for manufacturing other penicillins. There are many semi-synthetic penicillins derived from 6-APA and these are in three groups: antistaphylococcal ...
Phenoxymethylpenicillin, also known as penicillin V (PcV) and penicillin VK, is an antibiotic useful for the treatment of a number of bacterial infections. [2] Specifically it is used for the treatment of strep throat, otitis media, and cellulitis. [2]
Methicillin is resistant to beta-lactamases, which are enzymes secreted by many beta-lactam antibiotic-resistant bacteria. The presence of the ortho -dimethoxyphenyl group directly attached to the side-chain carbonyl group of the penicillin nucleus facilitates the β-lactamase resistance, since those enzymes are relatively intolerant of side ...
Inside was a talisman he’d been given by the treatment facility: a hardcover fourth edition of the Alcoholics Anonymous bible known as “The Big Book.” Patrick had tagged some variation of his name or initials on the book’s surfaces with a ballpoint pen, and its pages were full of highlighting and bristling with Post-its.
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Interferon beta-1a (also interferon beta 1-alpha) is a cytokine in the interferon family used to treat multiple sclerosis (MS). [5] It is produced by mammalian cells, while interferon beta-1b is produced in modified E. coli. [6] Some research indicates that interferon injections may result in an 18–38% reduction in the rate of MS relapses. [7]
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