Phytochemical Analysis, Antioxidant and Enzyme-Inhibitory Activities, and Multivariate Analysis of Insect Gall Extracts of Picea koraiensis Nakai

Picea koraiensis Nakai (PK) is an evergreen tree. It plays important role in landscaping and road greening. Insect galls of PK are formed by parasitism the adelgid Adelges laricis. Except for phenolics, other chemical constituents biological activity insect gall from still unknown. Thus, here, we performed phytochemical analyses extracts, aiming to turn waste into treasure serve human health. extracts were prepared using seven solvents. Antioxidant activities examined via antioxidant assays (radical oxidizing substance quenching, metal chelating, reducing power). The inhibitory determined toward key human-disease-related enzymes α-glucosidase, α-amylase, cholinesterase, tyrosinase, urease, xanthine oxidase. content numerous active was high methanol ethanol gall, these had highest enzyme-inhibitory activities. They also showed excellent stability low toxicity. These have potential use as stabilizers olive sunflower seed oils.