RADICAL SCAVENGING ACTIVITY OF TRITERPENE STEROIDS FROM STEM OFPOLYGONUM PULCHRUM Bl Journal title: International Journal of Pharmacy and Pharmaceutical Sciences Authors: Idin Sahidin, Nohong ., Asrul Sani, Marianti Anggrenimanggau, Asep Sukohar, Harto Widodo, Syarulnata... Subject(s):