CONSTITUENTS OF ENDIANDRA SPECIES .4. ISOLATION OF 2-(8'-[E,E)-5''-PHENYLPENTA-2'',4''-DIEN-1''-YL]BICYCLO[4,2,0]OCTA-2',4'-DIEN-7'-YL)ACETIC ACID, A BIOGENETICALLY PREDICTED METABOLITE OF ENDIANDRA-INTRORSA (LAURACEAE) AND ITS STRUCTURE DETERMINATION BY MEANS OF 1D-NMR SPECTROSCOPY AND 2D-NMR SPECTROSCOPY