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Molecular structure of Lantadene-B&C, triterpenoids ofantana camara, red variety: Lantadene-B, 22β-angeloyloxy-3-oxoolean-12-en-28-oic acid; Lantadene-C, 22 β-(S)-2′-methyl butanoyloxy-3-oxoolean-12-en-28-oic acid

  • M. Nethaji
  • C. Rufes
  • C. Sadasivan
  • Vasantha Pattabhi
  • O. P. Sharma
Article

Abstract

(I)Lantadene-B: C35H52O5,M r =552.80, MonoclinicC2,a=25.65(1),b=6.819(9),c=18.75(1) Å,β=100.61(9),V=3223(5) Å3,Z=4,D x =1.14 g cm−3 Cu (λ=1.5418A),μ=5.5 cm−1,F(000)=1208,R=0.118,wR=0.132 for 1527 observed reflections withF o ≥2σ(F o ). (II)Lantadene-C: C35H54O5·CH3OH,Mr=586.85, Monoclinic,P21,a=9.822(3),b=10.909(3),c=16.120(8)Å,β=99.82(4),V=1702(1)Å3,Z=2,D x =1.145 g cm−3, Mo (λ=0.7107Å), μ=0.708 cm−1F(000)=644,R=0.098, wR=0.094 for 1073 observed reflections. The rings A, B, C, D, and E aretrans, trans, trans, cis fused and are in chair, chair, sofa, half-chair, chair conformations, respectively, in both the structures. In the unit cell the molecules are stabilized by O-H⋯O hydrogen bonds in both the structures, however an additional C-H⋯O interaction is observed in the case of Lantadene-C.

Keywords

Hydrogen Methyl Reflection Physical Chemistry Hydrogen Bond 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • M. Nethaji
    • 1
  • C. Rufes
    • 2
  • C. Sadasivan
    • 2
  • Vasantha Pattabhi
    • 1
  • O. P. Sharma
    • 3
  1. 1.Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia
  2. 2.Department of Crystallography and BiophysicsUniversity of MadrasMadrasIndia
  3. 3.Biochemistry LaboratoryIndian Veterinary Research InstitutePalampur, H.P.India

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