Complete (1)H and (13)C NMR assignments of two new trans-clerodane diterpenoids from Otostegia limbata.
Two new tricyclic trans-clerodane diterpenoids trivially named as ballotenic acid A (1) and ballodiolic acid A (2) have been isolated from ethyl acetate fraction of Otostegia limbata. The structure assignments are based on (1)H and (13)C NMR spectra, 2D NMR (HMQC, HMBC, COSY, NOESY and NOE) techniques and comparison with the literature data.
Farooq
Umar
U
Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan.
Khan
Afsar
A
Ahmad
Viqar Uddin
VU
Khan
Saleha Suleman
SS
Farooq
Robina
R
Pervez
Arshid
A
Shah
Mohammad Mahroof
MM
D019659:Asteraceae / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry*; D045785:Diterpenes, Clerodane / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
D004224:Diterpenes; D045785:Diterpenes, Clerodane; D010936:Plant Extracts; C493026:ballodiolic acid; C493025:ballotenic acid