2-Anthracenesulfonic acid, 4-[[3-(acetylamino)phenyl]amino]-1-amino-9,10-dihydro-9,10-dioxo-, compd. with α,α',α''-(nitrilotri-2,1-ethanediyl)tris[ω-hydroxypoly(oxy-1,2-ethanediyl)] (1:1)