Isolasi, Identifikasi dan Uji Aktivitas Penghambat Enzim α-Glukosidase dan Uji Antioksidan Ekstrak Etil Asetat Kulit Batang Garcinia fruticosa Lauterb = Isolation, Identification, and Enzyme α-Glucosidase Inhibitory Activity Test and Antioxidant Activity Test from Ethyl Acetate Extract of Garcinia fruticosa Lauterb. Stem Bark.