2,2'-BICINCHONINIC ACID FREE ACIDBicinchoninic acid, 4,4'-dicarboxy-2,2'-biquinoline[2,2'-biquinoline]-4,4'-dicarboxylic acidBicinchoninic acid4,4'-Dicarboxy-2,2'-BiquinolineBicinchoninic acid2,2′-联喹啉-4,4′-二羧酸2,2′-二辛可宁酸2,2′-Biquinoline-4,4′-dicarboxylic acid2,2′-Bicinchoninic acid