Order aspidochirota

Compounds 3a, 3g-31 and 7c are the only A9,1 glycosides isolated from sea cucumbers belonging to the order Dendrochirotida. In general, 3(3-hydroxyholost-9(ll)-ene based aglycones were characterized in holothurins isolated from animals of the order Aspidochirota. 

Glycosides lOa-lOj were isolated from Stichopus chloronotus and Thelenota ananas, two sea cucumbers belonging to the order Aspidochirota [37]. 

Most of sea cucumber triterpene glycosides are tetra- or pentaglycosides. The majority of tetrasaccharides show a linear chain with the most common 3-0-Me-Glc-(l—>3)-Glc-(1 4)-Qui-(l—>2)-Xyl structure. The few disaccharides that have been isolated show a Qui-(1 2)-4-0S03Na-Xyl chain attached to C-3 of the triterpenoid aglycone. Some hexasaccharides have been isolated from sea cucumbers of the order Aspidochirota Stichopus japonica, Stichopus chloronotus, Parastichopus californius and Bohadschia bivittata [55]. They are non-sulfated glycosides with a linear 3-0-Me-Glc-(1 3)-Glc-(l- 4)-Xyl chain and a branching of a linear trisaccharide at C-2 of the xylose unit. 

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