Birhi, Damiana Nofita, et al. “PRELIMINARY PHYTOCHEMICAL ANALYSIS OF THE METHANOL EXTRACT OF RHODODENDRON RENSCHIANUM FLOWERS, ENDEMIC TO KELIMUTU NATIONAL PARK, INDONESIA, USING UV–VIS SPECTROPHOTOMETRY”. Walisongo Journal of Chemistry, vol. 9, no. 1, July 2026, pp. 112-26, doi:10.21580/wjc.v9i1.32005.