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Profile at 278 nm of S-26 VOO PF using HPLC-DAD (protocol D) (peak numbers: 1: Htyr, 2: Tyr, 3: Decarboxymethyl oleuropein aglycone, dialdehyde form, 3′: Other structure of decarboxymethyl oleuropein aglycone, dialdehyde form, 4: Decarboxymethyl ligstroside aglycone, dialdehyde form, 4′: Other structure decarboxymethyl ligstroside aglycone, dialdehyde form, 5: Oleuropein aglycone, 6: Ligstroside aglycone).
