Synonyms: Azinothricin,1-[erythro-3-hydroxy-N-[2-hydroxy-1-oxo-2-[tetrahydro-2-hydroxy-5-methyl-6-(1,3,5-trimethyl-4-oxo-1,5-heptadienyl)-2H-pyran-2-yl]propyl]-L-leucine]-4-(N-methyl-D-leucine)-,[2R-[2a,2(S*),5a,6b(1E,3S*,5E)]]-;13H,22H-Dipyridazino[6,1-f:6',1'-o][1,4,7,10,13,16]oxapentaazacyclononadecine,cyclic peptide deriv.; D-Threonine,erythro-3-hydroxy-N-[2-hydroxy-1-oxo-2-[tetrahydro-2-hydroxy-5-methyl-6-(1,3,5-trimethyl-4-oxo-1,5-heptadienyl)-2H-pyran-2-yl]propyl]-L-leucyl-D-hexahydro-3-pyridazinecarbonyl-N-hydroxy-O-methyl-L-seryl-N-methyl-D-leucyl-L-hexahydro-3-pyridazinecarbonyl-,r-lactone, [2R-[2a,2(S*),5a,6b(1E,3S*,5E)]]-; K 3619