Synonyms: 3H-21,18-Nitrilo-22H,24H-pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine-1,7,16,22(4H,17H,25H)-tetrone,8,9,14,15,26,26a-hexahydro-14-hydroxy-3-isopropyl-4,12-dimethyl- (8CI);Pristinamycin IIB (7CI); Virginiamycin M1, 26,27-dihydro-, (27R)-;3H-21,18-Nitrilo-1H,22H-pyrrolo[2,1-c][1,8,4,19]dioxadiazacyclotetracosine,virginiamycin M1 deriv.; (27R)-26,27-Dihydrovirginiamycin M1; Ostreogrycin G;Virginiamycin M2; Volpristin