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“Comparison of Total Tannin Levels in Extracts of Pegagan Leaves (Centella asiatica), Alang-Alang Roots (Imperata cylindrica), and Neem Leaves (Azadirachta indica) Using The UV-Vis Spectrophotometric Method”, JFM, vol. 9, no. 1, pp. 564–571, Oct. 2026, doi: 10.35451/jfm.v9i1.3769.