Quinupristin

**Semantic type:** Antibiotic|Pharmacologic Substance

**Definition:** A semi-synthetic derivative of pristinamycin, a natural occurring type B streptogramin. Quinupristin binds to the bacterial 50S ribosomal subunit, thereby inhibiting peptide chain elongation, and causing early termination of normal bacterial protein synthesis. Quinupristin is primarily effective against gram-positive cocci.

**Synonyms:** - N-((6R,9S,10R,13S,15aS,18R,22S,24aS)-22-(p-(Dimethylamino)benzyl)-6-ethyldocosahydro-10,23-dimethyl-5,8,12,15,17,21,24-heptaoxo-13-phenyl-18-(((3S)-3-quinuclidinylthio)methyl)-12H-pyrido(2,1-f)pyrrolo(2,1-l)(1,4,7,10,13,16)oxapentaazacyclononadecin-9-yl)-3-hydroxypicolinamide - QUINUPRISTIN - Virginiamycin S1, 4-(4-(dimethylamino)-N-methyl-L-phenylalanine)-5-(5-((1-azabicyclo(2.2.2)oct-3-ylthio)methyl)-4-oxo-L-2-piperidinecarboxylic Acid)-,(S)-