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Flavonoid Concentration and Tyrosinase Inhibition Activity of Ethanol Extract of Piper Crocatum (Piper Crocatum Var. Ruiz & Pav) from Various Regions in Indonesia and Their Correlations. Valensi 2023, 9 (1), 42-52. https://doi.org/10.15408/jkv.v9i1.31426.