A facile and efficient diastereoselective synthesis of methyl 3β-hydroxyeudesmane-4,11(13)-dien-12-oicate starting from (+)-dihydrocarvone has been carried out in 9 steps at the first time. A facile and efficient diastereoselective synthesis of methyl 3β-hydroxyeudesmane-4,11 (13) -dien-12-oicate starting from (+) - dihydrocarvone has been carried out in 9 steps at the first time.