Obtusalin is a triterpenoid found in R. dauricum for the first time and shows UV absorption at 210 nm.

(-)-Epigallocatechin-3-(3''-O-methyl) gallate is a natural product isolated from tea leaves with strong antioxidant, cytotoxic and antibacterial activity, which enhances the adhesive stability of etching rinsing adhesives to dentin.

2,4,5-Tribromoimidazole is a marine derived natural products found in Hexaplex trunculus.