Synonyms: 6-Methoxy-2-[3-(6-methoxy-3-methyl-2-benzothiazolinylidene)-2-[3-methyl-5-oxo-1-phenyl-2-(4-sulfobutyl)-3-pyrazolin-4-yl]propenyl]-3-methylbenzothiazoliumhydroxide, inner salt (7CI); Benzothiazolium, 2-[2-[2,3-dihydro-5-methyl-3-oxo-2-phenyl-1-(4-sulfobutyl)-1H-pyrazol-4-yl]-3-(6-methoxy-3-methyl-2(3H)-benzothiazolylidene)-1-propenyl]-6-methoxy-3-methyl-,hydroxide, inner salt; Benzothiazolium,2-[2-[2,3-dihydro-5-methyl-3-oxo-2-phenyl-1-(4-sulfobutyl)-1H-pyrazol-4-yl]-3-(6-methoxy-3-methyl-2(3H)-benzothiazolylidene)-1-propenyl]-6-methoxy-3-methyl-,inner salt (9CI); Benzothiazolium,6-methoxy-2-[3-(6-methoxy-3-methyl-2-benzothiazolinylidene)-2-[3-methyl-5-oxo-1-phenyl-2-(4-sulfobutyl)-3-pyrazolin-4-yl]propenyl]-3-methyl-,hydroxide, inner salt (8CI)