The isolation and characterization of 2 novel triterpene glycosides, eryloside C and eryloside D, from a sponge of the genus Erylus, collected at a depth of 500 m in South of New Caledonia, are described. The structures are characterized by the presence of a branched oligosaccharide chain, composed of 3 and 4 D-galactopyranose units. Anal. of the oligosaccharide structures was achieved by {1H, 1H} correlation spectroscopy, 2-dimensional homonuclear Hartmann-Hahn, and 1H-detected {1H, 13C} 1 bond (HMQC) and multiple-bond (HMBC) shift correlation of NMR expts. The novel lanostane-derived aglycon features a rare 14-carboxyl group and a 24-methylene,25-Me side chain.
Structure characterization by two-dimensional NMR spectroscopy, of two marine triterpene oligoglycosides from a Pacific sponge of the genus Erylus
RICCIO, Raffaele;
1992-01-01
Abstract
The isolation and characterization of 2 novel triterpene glycosides, eryloside C and eryloside D, from a sponge of the genus Erylus, collected at a depth of 500 m in South of New Caledonia, are described. The structures are characterized by the presence of a branched oligosaccharide chain, composed of 3 and 4 D-galactopyranose units. Anal. of the oligosaccharide structures was achieved by {1H, 1H} correlation spectroscopy, 2-dimensional homonuclear Hartmann-Hahn, and 1H-detected {1H, 13C} 1 bond (HMQC) and multiple-bond (HMBC) shift correlation of NMR expts. The novel lanostane-derived aglycon features a rare 14-carboxyl group and a 24-methylene,25-Me side chain.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
