Synonyms: 1-Oxa-4,7,10,13,16,19,22,25-octaazacyclooctacosane,cyclic peptide deriv.; (R)-N-(3-Hydroxy-1-oxodecyl)-L-seryl-D-seryl-L-2,4-diaminobutanoyl-D-2,4-diaminobutanoyl-L-arginyl-L-phenylalanyl-(Z)-2,3-didehydro-2-aminobutanoyl-threo-3-hydroxy-L-a-aspartyl-4-chloro-L-threonine b1-lactone; L-Threonine,N-(3-hydroxy-1-oxodecyl)-L-seryl-D-seryl-L-2,4-diaminobutanoyl-D-2,4-diaminobutanoyl-L-arginyl-L-phenylalanyl-(Z)-2,3-didehydro-2-aminobutanoyl-threo-3-hydroxy-L-a-aspartyl-4-chloro-, b1-lactone, (R)-