Direct Green B; C.I. 593; C.I. 30295; C.I. Direct Green; C.I. Direct Green 6; C.I. Direct Green 6, disodium salt; Direct Green 6; Diaminegreen; disodium (3E)-5-amino-6-[(E)-(4-nitrophenyl)diazenyl]-4-oxo-3-(2-{4'-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazinyl]biphenyl-4-yl}hydrazinylidene)-3,4-dihydronaphthalene-2,7-disulfonate