140638-26-2 Matlystatin E Pyrazolo(1,2-a)pyridazin-4-ium, 8-carboxy-1-(1-(((hexahydro-2-(2-(2-(hydroxyamino)-2-oxoethyl)-1-oxohexyl)-3-pyridazinyl)carbonyl)amino)-2-methylbutyl)-5,6,7,8-tetrahydro-, hydroxide, inner salt