Abstract: | Novel Coleons and Royleanones from Coleus somaliensis S. MOORE Reexamination of the fraction of polar diterpenoids from the title plant, in addition to the previously identified compounds of Scheme 1 2] 3], leads to the isolation of (15S)-coleon D ( 8 ), the abeo-royleanones 9–11 and the spirocoleons 12–17 . Crystalline (15S)-coleon I ( 3a ) is characterized. |