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Assessment of Antioxidant Activity of Ethanol Extract from Callyspongia arizusa Obtained from Parentek Beach, Minahasa Regency. PHA [Internet]. 2024 Oct. 31 [cited 2026 Nov. 7];13(3):738-44. Available from: https://ejournal.unsrat.ac.id/v3/index.php/pharmacon/article/view/55265