“Literature Review: Comparative Investigation of Antioxidants in Herbal Medicinal Plants on Java Island Using UV-Vis Spectrophotometry and the DPPH (2,2-difenil-1-pikrilhidrazil) Method” (2026) Journal of Pharmaceutical and Sciences, 9(1), pp. 143–151. doi:10.36490/journal-jps.com.v9i1.554.