CUPRATE(2-),[.MU.-[[3,3'-[METHYLENEBIS[[4-HYDROXY-6-(HYDROXY-.KAPPA.O)-3,1-PHENYLENE]AZO-.KAPPA.N1]]BIS[4-(HYDROXY-.KAPPA.O)-5-NITROBENZENESULFONATO]](6-)]]DI-,DIHYDROGEN
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1,6-二氢-6-氧代-1-苄氧基-2-吡啶甲酸