... Hydroxydroserone [5] H H CH3 OH OGlc Droserone-5-glucoside [6] OH H CH3 OH OGlc Hydroxydroserone-5-gluside R6 R 7 [7] CH3 H Rossoliside [8] H CH3 2-Methyl-hydrojuglone-4-glucoside ... Drosera [21] Naphthoquinone Droserone Hydroxydroserone Biramentaceonea Droserone-5-glucoside Rossoliside Hydroxydroserone-5-glucoside 2-Methylnaphtazarin-5-O- ... 3,01% dry weight (DW) of anthraquinone, larger than 2 ,78 % in leaves. - Anthraquinone content of red-leaf D. burmanni Vahl took 0 ,78 % of DW, compared with 2 ,78 % DW in green-leaf trees. - Biomass...