英文名称:C.I. Direct Red 80; (3Z)-4-oxo-7-({[(6Z)-5-oxo-7-sulfo-6-({2-sulfo-4-[(E)-(4-sulfophenyl)diazenyl]phenyl}hydrazono)-5,6-dihydronaphthalen-2-yl]carbamoyl}amino)-3-({2-sulfo-4-[(E)-(4-sulfophenyl)diazenyl]phenyl}hydrazono)-3,4-dihydronaphthalene-2-sulfonic acid; hexasodium (3