Abstract: Ten compounds were isolated from Elsholtzia densa Benth. and their structures were identified by spectral and chemical methods as following: n-nonacosane (1), succinic acid (2), 5- ( 3 ”, 3 ”-dimethylallyl ) -8-methoxyfurocoumarin (3), 5- ( 3 ”-methylbutyl) -8- methoxyfurocoumarin (4), 5- (3”-hydroxy-3”-methylbutyl) -8-methoxyfurocoumarin (5), 3, 4-dihydroxycinnamic acid ( 6 ), 5-hydroxy-3’-methoxyflavanone-7-O-rutinoside ( 7 ), quercetin-3-O-β-D-glucoside ( 8 ), kaempferol-3-O-β-D-glucoside ( 9 ), 5-hydroxy-4’- methoxyflavone-7-O-rutinoside (10). Among them, compounds 4 and 5 are new naturally occurring furocoumarins.

Key words: Elsholtzia densa, Labiate, Furocoumarin, Flavonoids