125164-64-9

Obtusalin is a triterpenoid found in R. dauricum for the first time and shows UV absorption at 210 nm. Obtusalin has some antibacterial activity[1][2].

[1] Jiang-Ling Li, et al. Antibacterial constituents from Melodinus suaveolens. Chin J Nat Med. 2015 Apr;13(4):307-10. doi: 10.1016/S1875-5364(15)30020-0. DOI:10.1016/S1875-5364(15)30020-0
[2] Helen L Alvarado, et al. Development and validation of a high-performance liquid chromatography method for the quantification of ursolic/oleanic acids mixture isolated from Plumeria obtusa. J Chromatogr B Analyt Technol Biomed Life Sci. 2015 Mar 1;983-984 DOI:10.1016/j.jchromb.2015.01.009