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  • 1
    Electronic Resource
    Electronic Resource
    Fern-9(11)-en-6α-ol–methanol (1/1) (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o228-o230 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, C30H50O·CH4O, is a triterpenoid. It consists of four six-membered rings and one five-membered ring. Of the four six-membered rings, two adopt the chair conformation, one is in the twist-boat conformation and the one containing a double bond is in a distorted chair conformation with distortion towards the boat conformation. The five-membered ring adopts the pure envelope conformation. There is a hydrogen bond between the O atom of the hydroxyl group at C6 and the O atom of the solvent molecule, but no other intermolecular hydrogen bonds exist in the structure, so it is stabilized by van der Waals interactions only.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801002215
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Pseudokobusine (2001)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. 68-69 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, hetisan-6,11β,15β-triol, C20H27NO3, is a hetisane-type diterpenoid alkaloid. It consists of six six-membered rings and two five-membered rings. The fused-ring system contains three chair, two boat, one distorted boat and two envelope conformations. Intramolecular and intermolecular hydrogen bonds are present between the O atoms, with O...O separations of 3.006 (3) and 2.743 (3) Å, as well as an O...N intermolecular interaction of 2.887 (3) Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100012828
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    (24R)-24,25-Dihydroxycycloartan-3-one (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 979-980 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the title compound, C30H50O3, the three six-membered rings adopt chair, twist and twist-boat conformations. The five-membered ring is in a slightly distorted envelope conformation. The substituent on the five-membered ring is in an extended conformation, with its two hydroxyl O atoms forming an intramolecular hydrogen bond. One of these O atoms also forms an intermolecular hydrogen bond with the oxygen of the carbonyl group in a neighbouring molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100004820
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Oleana-12(13),15(16)-diene-3α,28-diyl diacetate (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e60-e61 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, C34H52O4, consists of five six-membered rings. Barring the two rings, with double bonds, all other rings are in chair conformations. Mean-plane and ring-puckering calculations indicate these two rings to be in distorted-chair conformations, with distortion towards the boat conformation. There are no strong hydrogen bonds and the structure is stabilized by van der Waals interactions only. The structure is compared with those reported for other triterpenes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100000445
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    Paper (German National Licenses)
    Fulltext
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