Isolasi Dan Uji Aktivitas Antioksidan Senyawa Metabolit Sekunder Dari Ekstrak…

Goniothalamus sp. is one species of the family Annonaceae which is distributed in some parts of Indonesia, especially in the province of Riau. Isolation of methanol extract of the stem bark Goniothalamus sp. have been conducted and DPPH (1,1-Diphenyl-2-Picrylhydrazyl) method using microplate reader has been performed for antioxidant activity assay. The methanol extract was fractionated by vacuu…