The development of new products and technologies based on agro-industrial waste use has been caused by the dearth of raw materials linked to environmental factors. In this work, it was aimed at proving the potential of using Bagassa guianensis species forestry waste (MENDESS ROSS Ltda., located on Mucajaí – RR/Brazil) in obtaining bioactive compounds and the use of ethanolic extract as a bioproduct in combating oxidative stress. The chemical profile of ethyl acetate and ethanolic extracts, by HPLC, HPTLC and NMR, allowed to identify the presence of important phytochemical classes, such as fatty acids, stilbenes, moracins, flavanones and dihydroflavonols in both extracts, in addition to the identification of bioactive compounds of pharmacological and economic relevance, such as stilbenes trans -resveratrol, trans -oxyresveratrol, moracin M, moracin N and the aminosugar 1-deoxynojirimycin, their permanence in the raw material confirms the viability of using this waste even after industrial processing, which allows adding value to the species productive chain. The analysis of the antioxidant capacity showed an important action of ethanolic extract in the face of DPPḢ and ABTṠ + radicals solutions, with IC 50 23.71 and 5.79 µg/mL respectively, which suggests being related to its abundant phenolic composition, thus, indicating a possible bioproduct in the combat the effects caused by oxidative stress, in addition to its application in cosmetics, pharmaceuticals, stabilizing additives or even as a raw material for obtaining bioactive molecules in secondary processes.

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