Synonyms: 1-Oxa-4,7,10,13,16,19,22,25-octaazacyclooctacosane,cyclic peptide deriv.; Janthinomycin A; Stereoisomer ofL-isoleucyl-erythro-3-hydroxy-D-leucyl-L-threonyl-L-seryl-erythro-3-hydroxy-D-leucyl-2,3-didehydro-2-aminobutanoyl-D-seryl-threo-b-hydroxytryptophyl-D-ornithyl-L-phenylalanineb1-lactone