Synonyms: OstreogrycinB2 (7CI); Virginiamycin S1, 4-[N-methyl-4-(methylamino)-L-phenylalanine]-;12H-Pyrido[2,1-f]pyrrolo[2,1-l][1,4,7,10,13,16]oxapentaazacyclononadecine,cyclic peptide deriv.; Efepristin; Glycine,N-[(3-hydroxy-2-pyridinyl)carbonyl]-L-threonyl-D-a-aminobutyryl-L-prolyl-N-methyl-4-(methylamino)-L-phenylalanyl-4-oxo-L-pipecoloyl-L-2-phenyl-,r-lactone; Vernamycin Bb