Add to ORKGFrom the stem bark of Strychnos romeu-belenii Krukoff and Barneby, a Longaniacea of South America, a new indolinic alkaloid has been isolated to which the structure of 11-,11-methoxy-diaboline(I) has been assigned on the basis of UV, IR, NMR, ORD and MS data. The structure was confirmed by converting(I) into α-colubrine(II) (11-methoxy-strychnine) through the N-deacetyl-derivative(III) (11-methoxy-Wieland-Gumlich aldehyde). (I) by acetylation gives the isomer C-17 of condensamine (IV) for which we propose the name isocondensamine(v). In addition, 11-methoxy-Wieland-Gumlich aldehyde(III) yields on heating with acetic acid and sodium acetate the dimeric 11,11'-dimethoxy-caracurine v (vi)
peer reviewedA reinvestigation of Strychnos icaja roots has resulted in the isolation, from the EtOA...
New bis-indole alkaloids (strychnobiline and isostrychnobiline) were extracted from roots of Strychn...
Two new quaternary alkaloids, 9-methoxy-Nb-methylgeissoschizol and guiachrysine together with the kn...
From the stem bark of Strychnos romeu-belenii Krukoff and Barneby, a Longaniacea of South America, a...
11-methoxydiaboline, an alkaloid previously described by us, was isolated from the root bark of Stry...
11-methoxydiaboline, an alkaloid previously described by us, was isolated from the root bark of Stry...
The structure of strychnochromine, an unusual alkaloid isolated from a new batch of the root bark of...
The structure of strychnochromine, an unusual alkaloid isolated from a new batch of the root bark of...
We have isolated and identified three quaternary monomeric indole alkaloids from barks of Strychnos ...
Through a combination of spectroscopic techniques (UV, IR, MS, 1H and 13C NMR) it has been possible ...
Fourteen bis-indole alkaloids have been isolated from Strychnos usambarensis leaves. Nine are descri...
peer reviewedTwo new isomeric bis-indole alkaloids have been isolated from Strychnos usambarensis le...
A reinvestigation of Strychnos icaja roots has resulted in the isolation, from the EtOAC extract, of...
peer reviewedTwo new quaternary alkaloids, 9-methoxy-Nb-methylgeissoschizol and guiachrysine togethe...
peer reviewedTwo new isomeric bis-indole alkaloids have been isolated from Strychnos usambarensis le...
peer reviewedA reinvestigation of Strychnos icaja roots has resulted in the isolation, from the EtOA...
New bis-indole alkaloids (strychnobiline and isostrychnobiline) were extracted from roots of Strychn...
Two new quaternary alkaloids, 9-methoxy-Nb-methylgeissoschizol and guiachrysine together with the kn...
From the stem bark of Strychnos romeu-belenii Krukoff and Barneby, a Longaniacea of South America, a...
11-methoxydiaboline, an alkaloid previously described by us, was isolated from the root bark of Stry...
11-methoxydiaboline, an alkaloid previously described by us, was isolated from the root bark of Stry...
The structure of strychnochromine, an unusual alkaloid isolated from a new batch of the root bark of...
The structure of strychnochromine, an unusual alkaloid isolated from a new batch of the root bark of...
We have isolated and identified three quaternary monomeric indole alkaloids from barks of Strychnos ...
Through a combination of spectroscopic techniques (UV, IR, MS, 1H and 13C NMR) it has been possible ...
Fourteen bis-indole alkaloids have been isolated from Strychnos usambarensis leaves. Nine are descri...
peer reviewedTwo new isomeric bis-indole alkaloids have been isolated from Strychnos usambarensis le...
A reinvestigation of Strychnos icaja roots has resulted in the isolation, from the EtOAC extract, of...
peer reviewedTwo new quaternary alkaloids, 9-methoxy-Nb-methylgeissoschizol and guiachrysine togethe...
peer reviewedTwo new isomeric bis-indole alkaloids have been isolated from Strychnos usambarensis le...
peer reviewedA reinvestigation of Strychnos icaja roots has resulted in the isolation, from the EtOA...
New bis-indole alkaloids (strychnobiline and isostrychnobiline) were extracted from roots of Strychn...
Two new quaternary alkaloids, 9-methoxy-Nb-methylgeissoschizol and guiachrysine together with the kn...