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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Effects of chroman derivatives on platelet aggregation induced by some aggregating agents in rabbits.

1. We synthesized 10 chroman derivatives (CD-1 to CD-10) derived from khellactone, including praeruptorin A and praeruptorin B and examined the effects of these compounds on rabbit platelet aggregation. 2. These compounds exhibited an inhibitory effect on platelet-activating factor (PAF)-induced platelet aggregation and their effects were more potent on PAF-induced platelet aggregation than on adenosine triphosphate (ADP)-, arachidonate (AA)- or collagen-induced platelet aggregation. In particular, (+/-)-cis-5-methoxy-6-methoxycarbonyl-2,2-dimethyl-3,4-ditiglyloxychr oman (CD-6), (+/-)-cis-5-methoxy-6-(2-methoxycarbonylethenyl)-2,2-dimethyl- 3,4-ditiglyloxychroman (CD-8), (+/-)-cis-3,4-diacetoxy-5-methoxy-2,2-dimethyl-6-propylchroman (CD-9) and (+/-)-cis-5-methoxy-2,2-dimethyl-6-propyl-3,4-ditiglyloxychroman (CD-10) showed a moderate inhibition of PAF-induced platelet aggregation. 3. From these findings, it is suggested that compounds with potent PAF antagonist activities have the following features: (i) a tiglyloxy moiety is required at the 3 and 4 positions; and (ii) the methoxy moiety is also required at the 5 position of chroman skeleton in khellactone.[1]

References

  1. Effects of chroman derivatives on platelet aggregation induced by some aggregating agents in rabbits. Aida, Y., Kasama, T., Fukaya, H., Takeuchi, N., Sugiyama, K., Tobinaga, S. Clin. Exp. Pharmacol. Physiol. (1998) [Pubmed]
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