Abstract
A rare dimeric sesquiterpenoid (tinosposinoside,
) and a phenylpropanoid (cordifolioside C,
), two undescribed metabolites, were isolated from the methanolic extract of the stems of
together with thirteen known compounds. This is the second example of a sesquiterpene dimer where two monomers linked together through a cyclobutane ring, possibly generated through [2 + 2] cycloaddition. The structures of
and
were elucidated by NMR and mass techniques.