Two new trans-clerodane diterpenoids from Otostegia limbata.
Two new tricyclic clerodane-type diterpenoids, limbatolide D (1) and limbatolide E (2), have been isolated from the roots of Otostegia limbata. Their structures and the relative configuration were established on the basis of spectral methods, especially two-dimensional (2D) NMR techniques.
Ahmad
V U
VU
International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan. vuahmad@cyber.net.pk
Khan
A
A
Farooq
U
U
Kousar
F
F
Khan
S S
SS
Hussain
J
J
D045785:Diterpenes, Clerodane / Q000737:chemistry / Q000302:isolation & purification*; D019686:Lamiaceae / Q000737:chemistry*; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D018517:Plant Roots / Q000737:chemistry; D013051:Spectrometry, Gamma; D013056:Spectrophotometry, Ultraviolet
D045785:Diterpenes, Clerodane