Streptogramin; Virginiamycin; Pristinamycin

N- ((6S,9S,10S,13R,15aS,22S,24aS) -22-benzyl-6-ethyl-10,23-dimethyl-5,8,12,15,17,21,24-heptaoxo-13-phenyldocosahydro-12H-pyrido[2,1-f]pyrrolo[2,1-l][1]oxa[4,7,10,13,16]pentaazacyclononadecin-9-yl) -3-hydroxypicolinamide-- (12Z,6S,7S,8E,13E,15E,17S) -17-hydroxy-6-isopropyl-7,15-dimethyl-32,33-dihydro-31H-5-oxa-11-aza-1 (4,2) -oxazola-3 (1,5) -pyrrolacycloicosaphane-8,13,15-triene-2,4,10,19-tetraone (1/1)