This work describes the configurational and conformational analyses of 1,6,7-triacetoxy-8,13-epoxy-14-labden11-one, a labdane diterpenoid isolated from Plectranthus ornatus. Its relative stereochemistry was previously proposed by comparison with H and C NMR data of forskolin (2); however, the configurations of C-8 and C-13 have not been confirmed. Correlations between C NMR experimental data an...
