Glycosidic / glycosidically isolation

Pastore, P., Lavagnini, I., and Versini, G., Ion chromatographic determination of monosaccharides from trace amounts of glycosides isolated from grape musts, /. Chromatogr., 634, 47, 1993. 

The synthesis of the disaccharide subunit 85 of tricolorin A, a cytotoxic resin glycoside isolated from lpomoea tricolor, provides a unique opportunity to compare the efficiency of an RCM-based macro cyclization reaction with that of a more conventional macrolactonization strategy. Furthermore, this specific target molecule challenges the compatibility of the catalysts with various functional groups. 

Chen J, Fi WL, Wu JL, Ren BR, Zhang HQ. (2008) Hypoglycemic effects of a sesquiterpene glycoside isolated from leaves of loquat (Eriobotrya japonica (Thunb.) Lindl.). Phytomedicine 15 98-102. 

Enriquez RG, Leon I, Perez F, Walls F, Carpenter KA, Puzzuoli FV, Reynolds WF (1992) Characterization, by Two-Dimensional NMR Spectroscopy, of a Complex Tetrasaccharide Glycoside Isolated from Ipomoea stans. Can J Chem 70 1000... 

Table 1. Diterpene Glycosides Isolated from Stevia Leaves...

Glycosides isolated from leaves of various types of foxglove Digitalis lanta. Digitalis purpurea, and strophanthus Strophantus kombe, and also a number of other plants (hhes, periploca, oleander, hellebore, erysimum, jute, Irish ballon), which exhibit a direct effect on the myocardium and which strengthen its contractions. 

A mixture of cardiac glycosides isolated from Strophantus kombe mainly contains K-strophanthin- 8 and K-strophanthozide. 

Digitoxin Digitoxin, 3b,14b-dihydroxy-5b-card-20(22)enolide-3-tridigitoxide (17.1.1), is a glycoside isolated from leaves of various types of foxgloves. About 6 g of digitoxin are isolated from 10 kg of leaves [1-9]. 

FIGURE 19.9 HPLC chromatogram of standards of phenolic acids, flavonols, flavones, and glycosides isolated in onions and spinach. (From Nnntila, A.M. et al., Food Chem., 76, 519, 2002. Copyright 2002. With permission from Elsevier.)... 

Takara, K., D. Matsui, K. Wada, T. Ichiba, and Y. Nakasone. New antioxi-dative phenolic glycosides isolated from Kokuto non-centrifuged cane sugar. Biosci Biotechnol Biochem 2002 66(1) 29-35. 

Igarashi, T. Satake, M. Yasumoto, T. (1999) Structures and partial stereochemical assignments for prymnesin-1 and prymnesin-2 potent hemolytic and ichthyotoxic glycosides isolated from the red tide alga Prymnesium parvum. J. Am. Chem. Soc., 121, 8499-511. 

FIGURE 1.5 Flavonoid glycosides isolated from the aerial parts of Epilobium angustifolium. 

Brunner, G. et al., A novel acylated flavonol glycoside isolated from Brunfelsia grandiflora ssp. Grandiflora. Structure elucidation by gradient accelerated NMR spectroscopy at 14T, Phytochem. Anal., 11, 29, 2000. 

Most of the triterpenoid glycosides isolated so far from holothurians present a sugar chain of two to six monosaccharide units linked to the C-3 of the aglycone, which is usually based on a holostanol skeleton [3p,20S-dihydroxy-5a-lanostano- 18,20-lactone] (1), Fig.(l) [1]. 

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. 

Fig. (8). Structures of glycosides isolated from the sea cucumbers Holothuria leucospilota and Holothuria forskalii...

Frondoside B (9a), Cucumariosides A2-4 (9b) and A7-3 (9c), Fig. (9) as well as several triterpene glycosides isolated from the sea cucumbers Stichopus chloronotus (lOa-lOh) and Thelenota ananas (lOi, lOj), Fig. (10) contain the simple 3 (5-hydroxyholost-7-ene as the aglycone. An additional acetoxyl group in the side chain is present in compounds 10a-... 

Four glycosides isolated from the sea cucumber Cucumaria lefevrei [50] are the only examples of holothurins with a 16a-acetoxy group in their aglycones, Fig. (14). Lefevreiosides A2 (14b), B (14c) and C (14d) show the same monosuliated tetrasaccharide chain and differ in the degree of unsaturation or the position of the double bond in their side chains. Lefevreioside Ai (14a) is the desulfated analog of glycoside 14b. 

Several triterpene glycosides isolated from the sea cucumbers Cucumaria echinata and Pentamera calcigera contain a carbonyl group at C-23 in the side chain, Fig. (15). This structural feature is absent in 3(i-hydroxyholost-9(l l)-ene aglycones. 

Fig. (20). Glycoside isolated from the sea cucumber Cucumaria koraiensis...

---