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Isolation, structure determination and cytotoxicity of two new oleanane triterpenoids (I), (II), one new vibsane-type diterpenoid (III) and seven known compounds are described.

isolation, structure and cytotoxicity of brainicin (I), an unusual flavanol coupled with phenylpropyl and shikimic acid units, and new flavonol acylglycoside brainoside B (II) along with 14 known phenolic compounds

The 70% aqueous acetone extract of the aerial part of Viburnum foetidum var.foedidum afforded four new lignans (1-4) together with six known ones. The structures of the four new compounds were elucidated on the basis of I D (dimensional), 2D-NMR, and mass spectral analysis. The structure of compound 1, with a novel spirocyclic moiety, was also confirmed by X-ray diffraction analysis. Compounds 1-10 were evaluated for their cytotoxic activity. However, none of the compounds showed significant cytotoxic activity.

Two new sesquiterpene glucosides onitioside A (1) and dennstoside B (2), were isolated from the 95% EtOH extract of Dennstaedtia scabra (WALL.) MOORE, together with seven known compounds, onitisin (3), pterosin A (4), pinocembrin (5), pinocembrin 7-rutinoside (6), kaempferol (7), nicotiflorin (8), and galangin (9). Their structures were determined by extensive spectroscopic analysis.