Optimization of Xanthine Oxidase Activity, Phytochemical Screening, Toxicity Assay, and Antigout Activity of Spatholobus littoralis Hassk. Extract, Rahminiwati, Min, Sianipar Rut Novalia Ra, Sutriah Komar, Iswantini Dyah,, Achmadi Suminar Setiati, and Sulistyawan Ibnu Hari , Pharmacognosy Journal, June 2023, Volume 15, Issue 3, p.258-269, (2023)