2,2'-(benzene-1,4-diylbis((oxomethanediyl)imino-3,1-propanediylimino(oxomethanediyl)oxy)(2,3-dihydroxy-1,1-propanediyl)))bis(3-(acetylamino)-4-((amino(imino)methyl)amino)-3,4-dihydro-2H-pyran-6-carboxylic acid