Potassium persulfate

The fatty acids methyl esters (FAMEs) were purchased from Supelco Co. (Bellefonte, PA, USA). The standards of L-ascorbic acid (≥99%), gallic acid (>97.5%), DPPH (2,2-diphenyl-1-picrylhydrazyl), TPTZ (2,4,6-tripyridyl-S-triazine, ≥98%), ABTS (diammonium salt of 2,2′-azino-bis(3-ethylbenzthiazolin-6-yl)sulfonic acid, >99.0%), and dichloro-dihydro-fluorescein diacetate (≥97%, DCF-DA) were purchased from Sigma-Aldrich (St. Louis, MO, USA).
Organic solvents (dimethyl sulfoxide (DMSO, p.a.), ethanol (p.a.), methanol (p.a.)), hydrochloric acid (HCl, p.a.), iron (III) chloride (FeCl₃, p.a.), Folin–Ciocalteu reagent and NaHCO₃ (p.a.) were obtained from Kemika (Zagreb, Croatia), while potassium persulfate (>98%) was purchased from Scharlab (Barcelona, Spain). Hydrogen peroxide (H₂O₂, 30%) was obtained from Alkaloid Skopje (Skopje, North Macedonia).
Acetonitrile with 0.1% (v/v) formic acid and water with 0.1% (v/v) formic acid, both hypergrade for HPLC-MS LiChrosolv^®, were purchased from Supelco Co. (Bellefonte, PA, USA).
Zebrafish D. rerio adults of wild-type WIK strain were obtained from the European Zebrafish Resource Center of the Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany.
Used solvents were of HPLC grade and were obtained from J.T. Baker (Bridgewater, NJ, USA).

The reagents sodium carbonate, di-sodium hydrogen phosphate, sodium carbonate, potassium ferricyanide, potassium persulfate, ethylenediamine tetra acetic acid (EDTA) and gallic acid were purchased from Scharlau (Barcelona, Spain). Folin–Ciocalteu’s phenol reagent, absolute ethanol and trichloroacetic acid (TCA) were purchased from Panreac (Castellar del Vallès, Barcelona, Spain). 2,2-diphenyl-1-picrylhydrazyl (DPPH•) free radical, Iron (II) Chloride 4-hydrate, 6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylacid (Trolox), (L)-Dehydroascorbic acid and malondialdehyde (MDA) were purchased from Sigma Chemical Co. (Steinheim, Germany, and St. Louis, MO, USA). Propylgallate (PG) was purchased from Acrōs Organics (Fair Lawn, NJ, USA). 2-Thiobarbituric acid (TBA) was purchased from Merck KGaA (Darmstadt, Germany). The following standards were used: phenolic acids—hydroxybenzoic acid, vanillic acid, protocatechuic acid; cinnamic acids—chlorogenic acid, 4-coumaric acid; flavanols—catechin; flavonols—kaempferol, quercetin, kaempferol-3-O-rutinoside, kaempferol-3-O-glucoside, isorhamnetin-3-O-rutinoside, rutin or quercetin-3-O-rutinoside; flavanones—naringenin, eriodictyol, eriodictyol-7-O-glucoside (Merck KGaA, Darmstadt, Germany).

The standards of gallic acid (>97.5%), L-ascorbic acid (≥99%), DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (diammonium salt of 2,2′-azino-bis(3-ethylbenzthiazolin-6-yl)sulfonic acid, >99.0%), TPTZ (2,4,6-tripyridyl-S-triazine, ≥98%), dichloro-dihydro-fluorescein diacetate (≥97%, DCF-DA), AAPH (2,2-azobis (2-methylpropionamidine) dihydrochloride, 97%) and 2′,7′-dichlorofluorescin diacetate were purchased from Sigma-Aldrich (St. Louis, MO, USA).
Dimethyl sulfoxide (DMSO, p.a.), methanol (p.a.), ethanol (p.a.), iron (III) chloride (FeCl₃, p.a.), hydrochloric acid (HCl, p.a.), NaHCO₃ (p.a.) and Folin–Ciocalteu reagent were obtained from Kemika (Zagreb, Croatia). Hydrogen peroxide (H₂O₂, 30%) was purchased from Alkaloid (Skopje, Macedonia) and potassium persulfate (>98%) from Scharlau, (Regensburg, Germany).
The solvents used for SPE were of HPLC grade and were obtained from J.T. Baker (New Jersey, PA, USA).
Acetonitrile with 0.1% (v/v) formic acid and water with 0.1% (v/v) formic acid, both hypergrade for HPLC-MS LiChrosolv^®, were purchased from Supelco Co. (Bellefonte, PA, USA).