The essential oil of Blumea lanceolaria (Roxb.) Druce was analyzed by capillary gas chromatography and mass spectrometry. The main constituent was found to be methyl thymol (95%) which was confirmed by NMR spectrometry.
Dung, N. X., Loi, D. T., Hung, D. T., & Leclercq, P. A. (1991). Chemical composition of the oil of Blumea lanceolaria (Roxb.) Druce from Vietnam. Journal of Essential Oil Research, 3(4), 285-286. https://doi.org/10.1080/10412905.1991.9697940