2025. Determination of flavonoid levels of raru bark methanol extract (Cotylelobium lanceolatum Craib) on variations in solvent concentration using UV-Vis spectrophotometry method. Journal of Pharmaceutical and Sciences. 8, 1 (Mar. 2025), 437–449. DOI:https://doi.org/10.36490/journal-jps.com.v8i1.724.