Learn More
Following records about feeding habits of nymphalid butterflies, a novel nonproteinogenic L-amino acid, (S)-2-(3'-cyclopentenyl)glycine (11), was discovered in Rinorea ilicifolia, a species where the presence of a cyclopentanoid natural product of this kind was neither known nor anticipated from the taxonomic point of view. Another novel amino acid,(More)
Nineteen species of Passiflora (Passifloraceae) were examined for the presence of cyanogenic glycosides. Passibiflorin, a bisglycoside containing the 6-deoxy-beta-D-gulopyranosyl residue, was isolated from P. apetala, P. biflora, P. cuneata, P. indecora, P. murucuja and P. perfoliata. In some cases this glycoside co-occurs with simple(More)
Duplex formation from the self-complementary 12mer d(CGCGAATTCGCG) (Dickerson dodecamer) in which all phosphodiester linkages were replaced by phosphorothioate or phosphorodithioate linkages was studied using variable-temperature 1H and 31P NMR spectroscopy. Melting temperatures of the dodecamer, measured spectrophotometrically, showed significant decrease(More)
Two novel cyclopentenoid cyanohydrin glycosides, (1 S,4 R)-and (1 R,4 S)-1-[6- O-(alpha- L-rhamnopyranosyl)-beta- D-glucopyranosyloxy]-4-hydroxy-2-cyclopentene-1-carbonitrile, were isolated from seeds of the Indian medicinal plant HYDNOCARPUS PENTANDRA (F. Ham.) Oken (Flacourtiaceae) and characterized by optical rotations as well as (1)H-and (13)C-NMR(More)
  • 1