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“Antioxidan Activity from Methanol Extract of Kratom Leaves (Mitragyna speciosa) Maseration Result Using The DPPH Method: Aktivitas Antioksidan Ekstrak Metanol Daun Kratom (Mitragyna speciosa) Hasil Maserasi Menggunakan Metode DPPH”, Pharmasci, vol. 8, no. 2, pp. 137–142, Jul. 2023, doi: 10.53342/pharmasci.v8i2.357.