Eight neoclerodane diterpenoids were identified in the extract of the aeria
l parts of Teucrium maghrebinum. Three of these, 12-epi-teucjaponin A (1),
12-epi-montanin D (2), and 12-epi-montanin B (3), are new natural products,
whereas five, teucjaponin A, montanin D, 19-deacetylteuscorodol, teusalvin
C (4), and montanin B, are already known. These eight compounds form four
pairs of epimers at carbon C-12.