Nyoman Ehrich Lister, I.; Ginting, C. N.; Girsang, E.; Armansyah, A.; Marpaung, H. H.; Sinaga, A. P. F.; Anisa Siwianti Handayani, R.; Rizal, R. Antioxidant Properties of Red Betel (<i>Piper crocatum</I>) Leaf Extract and Its Compounds. JNR 2020, 19, 198-205.