Study on the chemical constituents of Selaginella tamariscina (Beauv.) Spring

To study the chemical constituents of Selaginella tamariscina (Beauv.) Spring. Various chromatographic techniques were used to separate and purify the chemical constituents. Their physico-chemical properties and spectral data were used to elucidate the structures. Four compounds were isolated from the n-BuOH fraction of the water-extracts. Their structures were identified as 1-hydroxy-2-[2-hydroxy-3-methoxy-5-(1-hydroxyethyl)-phenyl]-3-(4-hydroxy-3,5-dimethoxy)-propane-1-O-beta-D-glucopyranoside (tamariscinoside B, I), adenosine (II), guanosine (III), arbutin (IV). Tamariscinoside B (I) is a new compound, while the others were isolated from Selaginella for the first time.