1H and 13C NMR spectra of 3,8-dimethoxyfuro[3,2-g]coumarin and maculine from Esenbeckia grandiflora Martius (Rutaceae)

One- and two-dimensional NMR experiments were used for the unambiguous assignment of the H-1 and C-13 NMR chemical shifts of the furoquinoline alkaloid maculine (1) and the new furanocoumarin 3,8-dimethoxyfuro[3,2-g]coumarin (2). Copyright (c) 2005 John Wiley & Sons, Ltd.