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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of natural products 58 (1995), S. 1543-1554 
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 616-618 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, [2aS-(2aα,4aα,5α,7bα)]-5-(β-D-glucopyranosyloxy)-2a,4a,5,7b-tetrahydro-1-oxo-1H-2,6-dioxacyclopent[cd]inden-4-ylmethyl acetate monohydrate, C18H22O11·H2O, was extracted from the Turkish plant Putoria calabrica (L. fil.) DC. The three fused rings have envelope or distorted envelope conformations and form a bowl in which ring strain causes distortion of some bond angles and significant pyramidalization of two of the Csp2 atoms. The ring junction H atoms are all cis to one another and the glycosidic linkage is in the β axial position. The structure incorporates two symmetry-independent water molecules, each of which is located on a twofold axis. Intermolecular hydrogen bonds involving all the hydroxy groups and water molecules link the molecules into a complex three-dimensional framework.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1572-9915
    Keywords: INDIGENOUS KNOWLEDGE ; MEDICINAL PLANTS ; NONMEDICINAL PLANTS ; TRADITIONAL MEDICINE ; ETHNOBOTANY ; PLANT SELECTION CRITERIA ; TASTE ; SMELL ; HOT-COLD CLASSIFICATION ; YUCATEC MAYA ; YUCATAN (MEXICO)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Ethnic Sciences
    Notes: Abstract Medicinal plants are an important part of the environment as it is perceived by Mexican indigenous groups. The aim of this study, which was conducted over a period of 18 months in three Yucatec Mayan communities, is to better understand the selection criteria for medicinal plants. An important group of selection criteria are the flavor and aroma of plants. The absence of smell or taste indicates that the taxon has no potential medical value. Medicinal plants are more often considered to be sweet or aromatic (to smell good) or astringent, while a similar percentage of medicinal and nonmedicinal plants are considered bitter, spicy, acidic, or bad smelling. The relationship between the ethnobotanical data obtained for the individual plants and the secondary plant products (natural products) prominent in each species is specifically addressed in this paper. It shows that an understanding of the indigenous concepts used to distinguish medicinal from nonmedicinal species has considerable heuristic value.
    Type of Medium: Electronic Resource
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