Phalaharn, V., Pakdee, N., Pongnaratorn, P., Prathumtet, J. and Poowanna, R. 2025. Chemical composition analysis with TLC, HPLC and antioxidant activity from Justicia gendarussa Burm.f. leaf extract. Kalasin University Journal of Science Technology and Innovation. 4, 2 (Oct. 2025), 82–97. DOI:https://doi.org/10.14456/ksti.2025.14.