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![(2S)-2-[(3S)-3,4-Dihydro-3α-carboxy-5,6,7-trihydroxy-1-oxo-1H-2-benzopyran-4β-yl]butanedioic acid](https://structimg.guidechem.com/9/45/256724.png)


![BENZIMIDAZO[2,1-A]BENZ[D,E]ISOQUINOLION-7-ONE](https://structimg.guidechem.com/6/42/187481.png)


