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Indonesian forests are one of the richest ecosystems in the world. Secondary metabolites with molecular structures and various biological activities of medicinal plant extracts have excellent potential to be developed into medicines of various diseases. Phenolic compounds found in plants have many biological effects including antioxidants and antimicrobials. Secondary metabolite compounds play a protective role against damage caused by disease. Traditional medicine and treatment among the people of Kutai Kartanegara is very diverse and has been widely used. Type of Tapak Leman (Hippobroma longiflora (L) G. Don) is one type of forest plants have been used as a medicinal plant by Ethnic Kutai with the efficacy of treatment of kidney stones and increase of stamina or vitality. The aim of study is to investigate the biological activity of Tapak Leman forest type that had been used as medicine. The leaves of the plant samples were extracted using ethanol and then extracts tested phytochemical content, toxicity, biological activity of antioxidant and antimicrobial. Testing of antioxidant activity by spectrophotometric method using DPPH (1,1-diphenyl-2picrylhydrazyl), the level of toxicity using by BSLT (Brine Shrimp Lethality Test), and antimicrobials by diffusion method. The results showed is Tapak Leman type has a phytochemical content of alkaloids, flavonoids, tannins, saponis and steroids. Type of Tapak Leman properties is toxic, has strong antioxidant and strong on fungi.

Bioactivities of forest medicinal plants on kutai ethnic (Indonesia) of tapak leman (Hippobroma longiflora (L) G. Don)