英文别名5,5'-Ureylenebis[2-[[1-hydroxy-6-(phenylamino)-3-sodiosulfo-2-naphthalenyl]azo]benzoic acid sodium] salt; C.I.25355; C.I.Direct Violet 81; Direct Violet 81; tetrasodium,2-[(2E)-2-(6-anilino-1-oxo-3-sulfonatonaphthalen-2-ylidene)hydrazinyl]-5-[[4-[(2Z)-2-(6-anilino-1-oxo-3-sulfonatonaphthalen-2-ylidene)hydrazinyl]-3-carboxylatophenyl]carbamoylamino]benzoate