Cyclonatsudamine A, a new vasodilator cyclic peptide from Citrus natsudaidai

Bioorganic & Medicinal Chemistry Letters
2007.0

Abstract

A new cyclic heptapeptide, cyclonatsudamine A (1), cyclo (-Gly-Tyr-Leu-Leu-Pro-Pro-Ser-), has been isolated from the peels of Citrus natsudaidai and the structure was elucidated by 2D NMR analysis and chemical degradation. Cyclonatsudamine A (1) relaxed norepinephrine-induced contractions of rat aorta, which may be mediated through the increased release of NO from endothelial cells.

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