英文名称:1,3-Bipyridinium, 5-((4-((7-((1,2-dihydro-6-hydroxy-3,4-dimethyl-2-oxo(1,3-bipyridinium)-5-yl)azo)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)phenyl)azo)-1-(3-(dimethylamino)propyl)-1,2-dihydro-6-hydroxy-4-methyl-2-oxo-, salt with 2-hydroxypropanoic acid (1:2); 1,3’-Bipyridinium,5’-[[4-[[7-[(1’,2’-dihydro-6’-hydroxy-3,4-dimethyl-2’-oxo [1,3’-bipyridinium]-5’-yl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]azo]-1’- [3-(dimethylamino)propyl]-1’,2’-oxo-, salt with 2-hydroxypropanoic acid;