Longsri, B. et al. 2021. Determination of a Chemical Marker in Dipterocarpus alatus Oleoresin Samples and Bioactivity Screening via Antioxidants, Nitric Oxide Inhibition on Murine RAW 264.7 Cells, and Collagen Production on Normal Human Dermal Fibroblasts: doi.org/10.26538/tjnpr/v5i5.10. Tropical Journal of Natural Product Research (TJNPR). 5, 5 (May 2021), 850–856.