A new clerodane diterpene with antifeedant activity from Teucrium tomentosum.
A new diterpene, viz. 3beta-acetoxy-4alpha,18:15,16-diepoxy-6beta,12-dihydroxyneocleroda-13(16),14-dien-19,20-olide, C(22)H(28)O(8), exhibiting antifeedant activity against Spodoptera litura was isolated from the aerial parts of Teucrium tomentosum and its structure is reported. One of the two fused rings has a distorted-chair conformation and the other has a chair conformation. The molecules in the crystal are stabilized via O--H...O and C--H...O hydrogen bonds.
Soundarya Devi
S
S
Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
Malathi
R
R
Rajan
S S
SS
Aravind
S
S
Krishnakumari
G N
GN
Ravikumar
K
K
D000818:Animals; D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry* / Q000494:pharmacology; D045785:Diterpenes, Clerodane; D005247:Feeding Behavior / Q000187:drug effects; D006860:Hydrogen Bonding; D007306:Insecticides / Q000737:chemistry; D015394:Molecular Structure; D018411:Spodoptera; D031367:Teucrium / Q000737:chemistry*
D004224:Diterpenes; D045785:Diterpenes, Clerodane; D007306:Insecticides