Synonyms: D-Alanine,erythro-3-hydroxy-N-[2-hydroxy-1-oxo-2-[tetrahydro-2-hydroxy-6-methyl-5-(2-methylpropyl)-2H-pyran-2-yl]propyl]-L-leucyl-D-hexahydro-3-pyridazinecarbonyl-N-hydroxy-O-methyl-L-serylglycyl-L-2,3,4,5-tetrahydro-3-pyridazinecarbonyl-N-hydroxy-,r-lactone, [2S-[2a,2(S*),5a,6b]]-