Total Phenol and Tannins Test of Ethanol Extract of Keji Beling Leaves (Strobilanthes crispa Bl.) Using Spectrophotometry MethodIsfi Sofwatulmuna, Majida Ramadhan, Faisal, Hamdani Dwi Prasetyo, Putri Maharani Aulia Rakhman, Naura Dinnada Zulfa, Miftahul Rokhma, Qonita Mukrimatul Hijjah, Nafisa and Seftya Putri MahyantikaBIO Web Conf., 209 (2026) 01005DOI: https://doi.org/10.1051/bioconf/202620901005