New Sesqui- and Diterpenic Coumarin Ethers from the Roots of Aegle marmelos (L.) Corr.

Phytochemical investigation of the methanolic extract of Aegle marmelos (L.) Corr. (Rutaceae) roots resulted in the isolation of two new diterpenic coumarin ethers characterized as 8-(2´,6´,10´,14´-tetramethylhexadec-5´,13´-dien-3´-oxo) coumarin (2) and 8-(2´,6´,10´,14´-tetramethylhexadec-13´-en-3´-oxo) coumarin (3) and two new sesquiterpenic coumarin ethers identified as 8-(4´β,10´α-dimethyl-7´-isopropenyl-4´α-hydroxy-6´-oxo-decalin) coumarin (4) and 8-(4´β,10´α- dimethyl-7´-isopropenyl-4´α,5´β-dihydroxy-6´-oxo-decalin) coumarin (5) along with known compound n-hexacosan-1-ol (1). The structures of the isolated compounds were established by spectral data analysis.