2-DIMENSIONAL NMR OF SESQUITERPENES - 8-ASTERISK-COMPLETE ASSIGNMENT OF H-1 AND C-13 NMR-SPECTRA OF 7 SEQUITERPENE ALCOHOLS FROM NEOCALLITROPSIS-PANCHERI

The complete assignment of the proton and carbon NMR spectra for seven sequiterpene alcohols isolated from the heartwood oil of Neocallitrop sis pancheri, namely, alpha-, beta-, and gamma-eudesmol, carissone, gu aiol, bulnesol and elemol, was achieved using the concerted applicatio n of one- and two-dimensional NMR techniques including DEPT, COSY, HET COR and HMBC spectroscopy. The parameters previously reported in the l iterature were found to be often wrong or incomplete.