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.
Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan.
Umar
U
Farooq
Afsar
A
Khan
Viqar Uddin
VU
Ahmad
Saleha Suleman
SS
Khan
Robina
R
Farooq
Arshid
A
Pervez
Mohammad Mahroof
MM
Shah
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