Nguyen, T.D. et al. 2026. Large-scale semi-synthesis of indirubin from Strobilanthes cusia leaf extract and novel indirubin derivatives active against HT29 colon cancer cells. Journal of Tropical Science and Engineering. 1, 2 (Jun. 2026), 60–72. DOI:https://doi.org/10.58334/jtse.vol.001.849.