Two new minor cyclopeptides from Sagina japonica (Caryophyllaceae)

Two new minor cyclopeptides, named japonicin A (1), japonicin B (2), were isolated from the whole plants of Sagina japonica (Caryophyllaceae). Their structures were determined as cyclo-(Pro1-Pro2-Leu2-Leu1-Phe2-Pro3-Gly-Ser-Phe1) (1) and cyclo-(Pro1-Ile-Tyr-Asp-Pro2-Phe2-Pro3-Phe1) (2) on the basis of spectroscopic data, especially by two-dimension NMR technologies.

Graphical AbstractTwo new cyclopeptides, sajaponicin A (1), sajaponicin B (2), were isolated from Sagina japonica (Caryophyllaceae). Their structures were determined on the basis of spectroscopic data, especially by two-dimension NMR technologies.Figure optionsDownload as PowerPoint slide