| Title:  Quinupristin CAS Registry Number:  120138-50-3 CAS Name:  4-[4-(Dimethylamino)-N-methyl-L-phenylalanine]-5-[(2S,5R)-5-[[[(3S)-1-azabicyclo[2.2.2]oct-3-yl]thio]methyl]-4-oxo-2-piperidinecarboxylic acid]virginiamycin S1 Additional Names:  5d-[(3S)-3-quinuclidinyl]thiomethylpristinamycin IA Manufacturers' Codes:  RP-57669 Molecular Formula:  C53H67N9O10S Molecular Weight:  1022.22 Percent Composition:  C 62.27%, H 6.61%, N 12.33%, O 15.65%, S 3.14% Literature References:  Semisynthetic depsipeptide type I streptogramin, q.v.  Marketed in combination with dalfopristin, q.v.  Prepn:  J.-C. Barriere et al., EP 248703, eidem, US 4798827 (1987, 1989 both to Rhone-Poulenc).  In vitro activity:  H. C. Neu et al., J. Antimicrob. Chemother. 30, Suppl. A, 83 (1992).  HPLC determn in plasma:  A. Le Liboux et al., J. Chromatogr. B 708, 161 (1998). Properties:  White crystals in combination with methanol, mp ~200°.   Melting point:  mp ~200° Therap-Cat:  Antibacterial. Keywords:  Antibacterial (Antibiotics); Polypeptides.  |