Sorocein I, a new Diels-Alder type adduct from Sorocea ilicifolia.
From ethyl acetate extract of the root bark of Sorocea ilicifolia a new ketalized Diels-Alder type adduct, sorocein I (1), was isolated.
Prenylated flavanones from Sorocea ilicifolia
Abstract Chloroform extraction of the roots of Sorocea ilicifolia gave three new prenylated flavanones, soroceins F, E and G. In the extract, some Diels-Alder type adducts, already found in the Moraceae, were also present.
Phloroglucinol derivatives from Hypericum japonicum.
The isolation and identification of a new phloroglucinol derivative (2), a diterpenol (4), together with the known compounds flavesone (1) and sarothralen B (3), from the aerial parts of Hypericum japonicum are reported. Their structures were established by extensive spectral analysis and the structure of (3) has also been confirmed by a single crystal X-ray determination.