CAS No 101342-90-9 , D-Threonine,(3S)-N-[(2S)-2-[(2R,5S,6S)-6-[(1E,3S,5E)-3-ethyl-1,5-dimethyl-4-oxo-1,5-heptadien-1-yl]tetrahydro-2-hydroxy-5-methyl-2H-pyran-2-yl]-2-hydroxy-1-oxobutyl]-3-hydroxy-L-leucyl-(3R)-hexahydro-3-pyridazinecarbonyl-N-hydroxy-O-methyl-L-seryl-N-methyl-D-alanyl-(3S)-hexahydro-3-pyridazinecarbonyl-,(6®