From the turpentine broom, Thamnosma montana, four alkaloids and three coumarins were isolated and characterized. Skimmianine (5), N-methyl-acridone (4) and 5-(3'-methyl-2',3'-dihydroxybutanyl)-8-methoxypsoralen (1) were obtained previously from T. montana. Robustine (2) is reported from a Thamnosma
Eight furanocoumarins, one coumarin and four acridone derivatives have been identified in the roots of Thamnosma rhodesica (Rutaceae). Rhodesiacridone, one of these acridone derivatives, is reported here for the first time. Its structure was elucidated by spectrometric methods including ESI-HR, EI,