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Mass spectra used in identifying hesperetin glucuronides. (a) Component C, MS3 477 → 301 → ; (b) component D, MS3 477 → 301 ; → ; (c) hesperetin standard, MS/MS 301 → ; (d) [Co(II) (C–H) (4,7-diphenyl-1, 10-phenanthroline)2]+, MS/MS 1200 → ; (e) [Co(II) (D–H) (4,7-diphenyl-1, 10-phenanthroline)2]+, MS/MS 1200 → . Aux, auxiliary ligand 4,7-diphenyl-1,10-phenanthroline; Agl, aglycone portion of flavonoid; GlcA, glucuronic acid moiety.
