Fig. 3.

Chemical structures of ten flavonols from Flos Gossypii isolated by HSCCC

No.	compound	R1	R2	R3	R4	R5
I	Kaempferol-3-O-β-D-(6″-O-p-coumaroyl)-glucoside	(6″-p-coumaroyl) –Glu	H	H	OH	OH
II	8-methoxyl-kaempferol-7-O-β-D-rhamnoside	H	Rha	OMe	H	H
III	Astragalin	Glu	H	H	H	H
IV	4′-methoxyl-quercetin-7-O-β-D-glucoside	H	Glu	H	OH	OMe
V	Quercetin-3′-O-β-D-glucoside	H	H	H	OGlu	H
VI	--	--	--	--	--	--
VII	Hyperoside	Gal	H	H	OH	H
VIII	Quercetin-3-O-β-D-glucoside	Glu	H	H	OH	H
IX	Quercetin-7-O-β-D-glucoside	H	Glu	H	OH	H
X	Quercetin	H	H	H	OH	H