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Complete (1)H and (13)C NMR assignments of two new trans-clerodane diterpenoids from Otostegia limbata.

Farooq U, Khan A, Ahmad VU, , Khan SS, Farooq R, Pervez A, Shah MM

Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan.

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.

Published 6 August 2007 in Magn Reson Chem, 45(9): 766-9.
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