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Two new flavonolignans hydnowightin and neohydnocarpin isolated from Hydnocarp~s wightiana (BLUME) seed coats have been assigned structures X I and IVa on the basis of chemical degradations and spectral properties. A tentative biogenetic scheme for their formation has also been proposed.

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Three hitherto unknown phenolic constituents epilyoni-resinol, its glucoside and rhamnocitrin-3-O-rutinoside have been isolated from G. robusta wood and leaves besides kaempferol-3-O-rutinoside whereas 2,6-dimethoxybenzo-quinone, lyoniresinol and its rhamnoside are obtained from H. saligna wood. Their structures were assigned on the basis of chemical and spectral evidence.

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