An unusual natural product named 2,4,6-trihydroxacetophenone-3, 5-di-C-beta-D-glucoside (18) were isolated from aerial parts of Rhododendron lepidotum grows in Tibet, along with other 17 known compounds: hopenol-B (1), lupeol (2), ursolic acid (3), avicularin (4), quercetin (5), myricetin (6),