Complete 13C NMR assignments for ent‐kaurane diterpenoids from Sideritis species

Abstract

AbstractIn this work, the detailed NMR studies and full 13C NMR assignments for five diterpenoids isolated from Sideritis caesarea and Sideritis athoa are described. The assignments are based on a combination of 1D and 2D NMR techniques including 1H, 13C, 1H1H COSY, gHSQC [1J(C,H)] and gHMBCδC [nJ(C,H) (n = 2 and 3)] and NOESY experiments. Copyright © 2011 John Wiley & Sons, Ltd.