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Identification and analysis of anthocyanins in five blueberry extracts. (A) HPLC chromatogram with UV detection at 280, 360, and 520 nm of S1 from Northeast China. (B–G) +MS and +MS2 of six different skeletons of anthocyanin compounds in five blueberry extracts under positive ion mode [M+] by HPLC-MS/MS spectra.
