Glycine, 3-hydroxy-N-(2-hydroxy-1-oxo-2-(tetrahydro-2-hydroxy-5-methoxy-6-(1,3,5,7-tetramethyl-1-nonenyl)-2H-pyran-2-yl)propyl)leucylhexahydro-3-pyridazinecarbonyl-N-hydroxyglycyl-N-methylglycylglycyl-N-methyl-, rho-lactone