2-[4-[(hexahydro-2,4,6-trioxopyrimidin-5-yl)azo]phenyl]-6-methylbenzothiazole-7-sulphonic acid

2-[4-[[(Hexahydro-2,4,6-trioxopyrimidin)-5-yl]azo]phenyl]-6-methyl-7-benzothiazolesulfonic acid

2-[4-(4-Hydroxy-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-5-yl)phenyl]-6-methylbenzothiazole-7-sulfonic acid