Rapulasides A and B: two novel intermolecular rearranged biiridoid glucosides from the roots of Heracleum rapula
摘要:
Two novel intermolecular rearranged biiridoid glucosides, rapulasides A and B (I and 2), have been isolated from the roots of Heracleum rapula. Their structures were identified by extensive spectral analysis especially different NMR techniques. NOESY experiment, with the help of Dreiding molecular model, was used to elucidate their relative stereochemistry. Both compounds were tested for their inhibitory effects on rabbit platelet aggregation induced by PAF, ADP, or AA, respectively. Only trends of inhibition were observed for them. (c) 2005 Elsevier Ltd. All rights reserved.