Khunnawutmanotham, N.; Chimnoi, N.; Nangkoed, P.; Hasakunpaisarn, A.; Wiwattanapaisarn, W.; Techasakul, S. Facile Extraction of Three Main Indole Alkaloids from Mitragyna speciosa by Using Hot Water. ChemistrySelect 2021, 6, 10221–10225.

Synergistic cytotoxicity and apoptosis induced in human cholangiocarcinoma cell lines by a combined treatment with tumor necrosis factor-alpha (TNF-alpha) and triptolide. Panichakul T, Wanun T, Reutrakul V, Sirisinha S Asian Pac J Allergy Immunol20p167-73(2002 Sep) 

Kittakoop, P.; Darshana, D.; Sangsuwan, R. Alkaloids and Alkaloid-Like Compounds are Potential Scaffolds of Antiviral Agents against SARS-CoV-2 (COVID-19) Virus. Heterocycles 2022, 105 (Special Issue), 115 – 146.