Also Called: Tannins, compounds with 4,4'-[(4-methyl-1,3-phenylene)bis(azo)]bis[6-methyl-1,3-benzenediamine];Tannins, compds. with 4,4'-[(4-methyl-1,3-phenylene)bis(azo)]bis[6-methyl-1,3-benzenediamine];Tannins, compds. with 4,4'-[(4-methyl-1,3-phenylene)bis(2,1-diazenediyl)]bis[6-methyl-1,3-benzenediamine]