ABSTRACT
In addition to solamargine, anguivine and isoanguivine, two new steroidal alkaloid glycosides, (23S)-23-hydroxyanguivine and (23S)-23-hydroxyisoanguivine, have been isolated from roots of Solanum uporo, the structures of which have been assigned by comparison with literature data as (23S,25R)-3 beta-[O-alpha-L-rhamnopyranosyl-(1-->2)-O- [beta-D-xylopyranosyl-(1-->3)]-beta-D-glucopyranosyloxy]-22 alpha N-spirosol-5-en-23-ol and (23S,25R)-3 beta-[O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D- xylopyranosyl-(1-->3)]-beta-D-galactopyranosyloxy]-22 alpha N-spirosol-5-en-23-ol.
Subject(s)
Glycosides/chemistry , Plant Roots/chemistry , Carbohydrate Conformation , Carbohydrate Sequence , Glycosides/isolation & purification , Magnetic Resonance Spectroscopy , Molecular Sequence DataABSTRACT
In addition to khasianine, solamargine, xylosylsolamargine and solasonine, three steroidal alkaloid glycosides, solasuaveoline, dihydrosolasuaveoline and isosolasuaveoline, have been isolated from aerial parts of Solanum suaveolens. The structures have been assigned by NMR investigations as (25R)-3 beta-{O-beta-D-glucopyranosyl-(1-->2)-O-beta-D- glucopyranosyl-(1-->4)-[O-alpha-L-rhamnopyranosyl-(1-->2)]-beta-D- galactopyranosyloxy}-22 alpha N-spirosol-5-ene, (25R)-3 beta-{O-beta-D-glucopyranosyl-(1-->2)-O- beta-D-glucopyranosyl-(1-->4)-[O-alpha-L-rhamnopyranosyl-(1-->2)]-beta-D - galactopyranosyloxy}-5 alpha, 22 alpha N-spirosolane and (25R)-3 beta-{O-beta-D-glucopyranosyl-(1-->6)-O- beta-D-glucopyranosyl-(1-->3)-[O-alpha-L-rhamnopyranosyl-(1-->2)]-beta-D - galactopyranosyloxy}-22 alpha N-spirosol-5-ene, respectively.
Subject(s)
Glycosides/chemistry , Solanaceae/chemistry , Solanaceous Alkaloids/chemistry , Steroids/chemistry , Carbohydrate Sequence , Carbohydrates/analysis , Glycosides/isolation & purification , Molecular Sequence Data , Molecular Structure , Nuclear Magnetic Resonance, Biomolecular , Solanaceous Alkaloids/isolation & purification , Steroids/isolation & purificationABSTRACT
Besides a series of known sterols and triterpenoids, 2-methyl-5-(Z-nonadec-14-enyl)resorcinol and 5-(Z-nonadec-14-enyl)resorcinol have been isolated from leaves of Ardisia silvestris. The last mentioned diphenol has also been obtained from roots of Ardisia gigantifolia. The structures of these resorcinol derivatives were elucidated.
ABSTRACT
In addition to solamargine, isoanguivine and solasonine, two new steroid alkaloid glycosides, xylosylsolamargine and xylosyl-beta-solamarine, have been isolated from the aerial parts of Solanum coccineum, the structures of which have been elucidated as (25R)-3 beta-[O-beta-D-xylopyranosyl-(1-->2)-O-alpha-L-rhamnopyranosyl- (1-->4)-O-[alpha-L-rhamnopyranosyl-(1-->2)]-beta-D-glucopyranosyloxy+ ++]-22 alpha N-spirosol-5-ene and (25S)-3 beta-[O-beta-D-xylopyranosyl-(1-->2)-O-alpha-L-rhamnopyranosyl- (1-->4)-O-[alpha-L-rhamnopyranosyl-(1-->2)]-beta-D-glucopyranosyloxy+ ++]-22 beta N-spirosol-5-ene.
Subject(s)
Alkaloids/chemistry , Glycosides/chemistry , Oligosaccharides/chemistry , Plants , Steroids/chemistry , Alkaloids/isolation & purification , Carbohydrate Conformation , Carbohydrate Sequence , Glycosides/isolation & purification , Magnetic Resonance Spectroscopy , Mass Spectrometry , Molecular Sequence Data , Molecular Structure , Oligosaccharides/isolation & purification , Steroids/isolation & purificationABSTRACT
The new biflavonoids 2'-methoxysocotrin-5'-ol, socotrin-4'-ol, and homoisosocotrin-4'-ol were isolated from dragon's blood of Dracaena cinnabari and their structures elucidated mainly by NMR spectroscopy.
ABSTRACT
Solamargine, solasonine, N-hydroxyrobustine and a new glycoalkaloid, N-hydroxysolamargine, has been isolated from the leaves of Solanum robustum, the structure of which has been elucidated as (25R)-3beta-{O-alpha-L-rhamnopyranosyl-(1-->2)-O-[alpha-L- rhamnopyranosyl- (1-->4)]-beta-D-glucopyranosyloxy}-22alphaN- spirosol-5-en-N-ol.
Subject(s)
Alkaloids/chemistry , Glycosides/chemistry , Plants/chemistry , Steroids/chemistry , Alkaloids/isolation & purification , Carbohydrate Conformation , Carbohydrate Sequence , Glycosides/isolation & purification , Molecular Conformation , Molecular Sequence Data , Molecular Structure , Plant Leaves , Steroids/isolation & purificationABSTRACT
In addition to solamargine, two new steroid alkaloid glycosides, anguivine and isoanguivine, have been isolated from the roots of Solanum anguivi, the structures of which have been elucidated as (25R)-3 beta-[O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D- xylopyranosyl-(1-->3)]-beta-D-glucopyranosyloxy]-22 alpha N-spirosol-5-ene and (25R)-3 beta-[O-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D-xylopyranosyl- (1-->3)-beta-D-galactopyranosyloxy]-22 alpha N-spirosol-5-ene.
Subject(s)
Phytosterols/isolation & purification , Plants/chemistry , Solanaceous Alkaloids/isolation & purification , Carbohydrate Sequence , Magnetic Resonance Spectroscopy , Mass Spectrometry/methods , Molecular Sequence Data , Phytosterols/chemistry , Solanaceous Alkaloids/chemistryABSTRACT
Tomatidenol, 15alpha-hydroxytomatidenol, and yamogenin were isolated from the leaves, and etioline from the roots of SOLANUM SPIRALE.
ABSTRACT
Se plantea en este estudio que la corydina está presente en las especies endémicas cubanas, Guatteria moralessi y G. cubensis, y la liriodenina también lo está en esta última(AU)
