Table 2.

HPLC-DAD-MS data of major flavonoids identified in the extract of Apocynum venetum and Apocynum pictum.

Name of Flavonoids	Peak	Retention Time (min)	UV λmax	MW	MS Fragmentation Data (ve)
Chlorogenic acid	1	7.50	240, 326	354	352.7, 190.7
Rutin	2	18.94	256, 354	610	608.7, 300.8
Hyperoside	3	20.79	256, 354	464	462.6, 300.8
Isoquercetrin	4	22.00	256, 354	464	462.6. 300.7
Acetylated hyperoside	5	26.59	256, 354	506	504.6, 462.8
Trifolin	6	28.04	264, 346	448	446.7, 283.7
Acetylated isoquercetrin	7	28.92	366, 354	506	504.6, 462.6
Astragalin	8	31.99	266, 346	448	446.6, 283.6
Quercetin	9	49.20	256, 370	302	300.8, 150.7
Kaempferol	10	51.00	266, 366	286	284.8, 150.8