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Optimization of Water-Ethanol Solvent Composition of Red Betel Leaf Extraction (Piper crocatum Ruiz & Pav) Using Simplex Latice Design Method on Antioxidant Activity. JFM [Internet]. 2025 Nov. 1 [cited 2025 Nov. 3];8(1):311-9. Available from: https://ejournal.medistra.ac.id/index.php/JFM/article/view/3112