Structure of stachysolone

Summary It has been shown that stachysolone — a bitter substance fromStachys annua L. — is a diterpenoid with a rearranged labdane hydrocarbon skeleton of the kolavane type. Structural formula (I) has been established for stachysoloneInstitute of Chemistry, Academy of Sciences of the Moldavian SSR. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czechoslovakian SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 295–299, May–June, 1972.