The known lignan (-)-grandisin [1] has been isolated from Cryptocarya crassinervia by using the brine shrimp lethality test to direct the isolation; its structure and relative stereochemistry have been determined by ir, 1H nmr, ms, and X-ray crystallography as an all-trans alpha, alpha'-diaryl-beta,
OBJECTIVE
The antitumoural properties of grandisin, a tetrahydrofuran neolignan from Piper solmsianum, were investigated by in-vitro and in-vivo assays using the Ehrlich ascites tumoural (EAT) model.
METHODS
Viability of the tumour cells was evaluated by Trypan blue exclusion and MTT methods, after
Chemical investigation of Cassia grandis leaves resulted in the isolation of the new 2-methoxy 6,7,2',6'-tetrahydroxy flavanone 6-O-β-glucoside together with the known flavonol glycosides, kaempferol-3-O-α-rhamnoside, and quercetin 3-O-α-rhamnoside. The structure assign ments were based on
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