The Effect of Nano Extract Formulation on Antioxidant Activity of 70% Ethanolic Extract of Purple Sweet Potato’s Leaves (Ipomoea batatas L.) Antin-3 Variety: Pengaruh Formulasi Nano Ekstrak terhadap Aktivitas Antioksidan Ekstrak Etanol 70% Daun Ubi Jalar Ungu (Ipomoea batatas L.) Varieas Antin-3. Pharmasci. 2022;7(1):43-47. doi:10.53342/pharmasci.v7i1.270