Table 1

UV absorption of isolated furanocoumarins from grapefruit juice or oil

Furanocoumarin^1-a	Molecular Mass	Absorption Peaks^1-b
		nm
DHB	372	218,	247,	256^1-c,	264^1-c,	306
GF-I-5	354	218,	247,	255^1-c,	263^1-c,	309
GF-I-1	726	217,	247,	255^1-c,	264^1-c,	306
GF-I-6	726		243,			308
GF-I-2	338	217,	247,	256^1-c,	264^1-c,	307
GF-I-4	708	218,	246,	254^1-c,	263^1-c,	307

↵1-a See Fig. 1. for chemical structures.
↵1-b Samples are dissolved in methanol and scanned from 200 to 500 nm at room temperature.
↵1-c Shoulder.