Abstract
A new (1) and two known (2-3) diterpene lactones belonging to a rare class of diepoxy abietaneolide, were isolated from the cytotoxic extract of Suregada multiflora. New compound 1 is characterized as 3β-hydroxy-8,14β:11,12α-diepoxy-13(15)-abietane-16,12-olide, on the basis of extensive spectral studies. This is the first report describing 2D NMR studies of this unique class of diepoxy abietaneolide.