Hasnaeni et al. 2025. Quantification of Flavonoid Compounds in Keji Beling Leaves (Strobilanthes Crispa (L.) Blume) Extracted by Ultrasonic Assisted Extraction (UAE) and Maceration Using TLC Densitometry. Hydrogen: Jurnal Kependidikan Kimia. 13, 5 (Nov. 2025). DOI:https://doi.org/10.33394/hjkk.v13i5.17748.