Abstract Four neo-clerodane diterpenoids have been isolated from aerial material of Scutellaria galericulata. Three compounds, jodrellin T, 14,15-dihydrojodrellin T and galericulin, are novel structures. The fourth, jodrellin B has been previously isolated from Scutellaria woronowii. Jodrellin B is amongst the most potent neo-clerodane antifeedants so far described, 14,15-dihydrojodrellin T is also active. Chemical structures were rigorously determined by spectroscopic methods.