Structure of cucumariosides H5, H6, H7 and H8, triterpene glycosides from the sea cucumber Eupentacta fraudatrix and unprecedented aglycone with 16,22-epoxy-group.

@article{Silchenko2011StructureOC,
  title={Structure of cucumariosides H5, H6, H7 and H8, triterpene glycosides from the sea cucumber Eupentacta fraudatrix and unprecedented aglycone with 16,22-epoxy-group.},
  author={Alexandra S. Silchenko and Anatoly I. Kalinovsky and Sergey A. Avilov and Pelageya V Andryjaschenko and P S Dmitrenok and Ekaterina A. Yurchenko and Vladimir I. Kalinin},
  journal={Natural product communications},
  year={2011},
  volume={6 8},
  pages={1075-82}
}
Four new triterpene glycosides cucumariosides H5 (1), H6 (2), H7 (3) and H8 (4) along with the known cucumarioside H (5) have been isolated from the Far Eastern sea cucumber Eupentacta fraudatrix. The structures of glycosides 1-4 were elucidated on the basis of spectral data (2D NMR and MS). Glycosides 1-4 belong to the group o f cucumariosides H having branched rare pentasaccharidecarbohydrate moieties with one sulfate group and 3-O-methyl-D-xylose as a terminal monosaccharide unit. Glycosides… CONTINUE READING