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In the previous papers,we reported the structural elucidation of stellarins A-E,fivenew cyclopeptides from the fresh roots of Stellaria yunnanensis Franch.Further chemical study on this plant led to the isolation of two other new cyclopeptides named stellarins F(l) and G(2).By a combination of 2D-NMR,enzymatic degradation and FABMS,their structures were established to be cyclo(Gly-Ala-Gly-Ser-Pro-Trp-Phe-Pro) and cyclo(Gly-Ala-Tyr-Leu-Ala),respectively.
In the previous papers, we reported the structural elucidation of stellarins AE, five new cyclopeptides from the fresh roots of Stellaria yunnanensis Franch. Further chemical study on this plant led to the isolation of two other new cyclopeptides named stellarins F (1) and G (2 ). By a combination of 2D-NMR, enzymatic degradation and FABMS, their structures were established to be cyclo (Gly-Ala-Gly- Ser- Pro- Trp-Phe- Pro) and cyclo (Gly- Ala- Tyr- Leu- Ala), respectively.