“…A few natural caryolane sesquiterpenes were reported from Sindora sumatrana (family Leguminosae) (Heymann et al, 1994a,b), Senecio species (Asteraceae) (Bohlmann and Ziesche, 1981), Sinacalia tangutica (Asteraceae) (Zhu et al, 2008), Cyperus longus (Cyperaceae) (Xu et al, 2004), Magnolia obovata (Magnoliaceae) (Matsuda et al, 2001), and Neolitsea hiiranensis (Lauraceae) (Liou et al, 2011). Most of the stereochemical orientations of the methano bridge were opposite H-2 (Bohlmann and Ziesche, 1981;Heymann et al, 1994a;Matsuda et al, 2001;Xu et al, 2004;Choudhary et al, 2006;Zhu et al, 2008;Liou et al, 2011). Only 9-oxoisocaryolane-1-ol from Sindora sumatrana possessed the same orientation (Heymann et al, 1994b).…”