Synthesis and Absolute Configuration of a New 3,4-Dihydro-.BETA.-carboline-Type Alkaloid, 3,4-Dehydro-5(S)-5-carboxystrictosidine, Isolated from Peruvian Una de Gato (Uncaria tomentosa).

Synthesis and Absolute Configuration of a New 3,4-Dihydro-.BETA.-carboline-Type Alkaloid, 3,4-Dehydro-5(S)-5-carboxystrictosidine, Isolated from Peruvian Una de Gato (Uncaria tomentosa). A New Gluco Indole Alkaloid, 3, 4-Dehydro-5-carboxystrictosidine, from Peruvian Una de Gato (Uncaria tomentosa). A New Gluco Indole Alkaloid, 3, 4-Dehydro-5-carboxystrictosidine, from Peruvian Una de Gato (Uncaria tomentosa). Alkaloids from Palicourea coriacea (Cham.) K. Schum. Alkaloids from Palicourea coriacea (Cham.) K. Schum. Unnatural spirocyclic oxindole alkaloids biosynthesis in Uncaria guianensis A novel tryptophan-derived alkaloid and other constituents from Guettarda speciosa (Rubiaceae: Cinchonoideae–Guettardeae) Investigation of Uña De Gato I. 7-Deoxyloganic acid and 15N NMR spectroscopic studies on pentacyclic oxindole alkaloids from Uncaria tomentosa New Indole Alkaloid Glycosides fromNauclea orientalis Quaternary β-carboline alkaloids from Psychotria prunifolia (Kunth) Steyerm.