... Drosera [ 21] Naphthoquinone Droserone Hydroxydroserone Biramentaceonea Droserone-5-glucoside Rossoliside Hydroxydroserone-5-glucoside 2-Methylnaphtazarin-5-O- ... 1 1. 1. 1 1. 2. 2 1. 3. 2 1. 4. 2 3 2 .1. Drosera burmanni Vahl 3 2 .1. 1. 3 2 .1. 2. ... 3 2 .1. 3. 4 2 .1. 4. 6 2 .1. 5. 7 2 .1. 6. 8 2 .1. 7. 11 2 .1. 8. 12 2 .1. 8 .1. ...