| 英文名称: | | 1,3'-bipyridinium, 5'-[(2,5-dichlorophenyl)azo]-1',2'-dihydro-6'-hydroxy-4'-met | | salt with hydroxybutanedioic acid (1:1) | | 3'-bipyridinium,5'-[(2,5-dichlorophenyl)azo]-1',2'-dihydro-6'-hydroxy-4'-methyl-2'-oxo- salt with hydroxybutanedioic acid (1:1) |
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