Nine new neoclerodane diterpenoids, scupolins A-I, have been isolated
from an Me2CO extract of the aerial parts of Scutellaria polyodon (3-1
1), together with the known neoclerodanes jodrellin B (1) and scutecol
umnin A (2). Structures 3-11 were established by spectroscopic means a
nd by comparison with closely related compounds.