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[2,2'-Biquinoline]-4,4'-dicarboxylic acid: BD642511245-13-297%; ￥81.05g

2,2'-Biquinoline: BD16798119-91-598%; ￥507.025g

Potassium [2,2-biquinoline]-4,4-dicarboxylate trihydrate: BD245118207124-63-898%; ￥97.05g

6,6'-Biquinoline: BD01038834612-79-395%; ￥4085.01g

Potassium [2,2'-biquinoline]-4,4'-dicarboxylate: BD6427463451-34-398% (Loss on drying≤10%); ￥118.05g

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