[Studies on chemical constituents from bee-collected rape pollen].
OBJECTIVE
To study the chemical constituents of the bee-collected rape pollen.


METHODS
The compounds were isolated by column chromatography on silica gel; Sephadex LH-20 and C18. Their structures were elucidated on the basis of spectral analysis.


RESULTS
Nine compounds were isolated from the bee-collected rape pollen and the structures of them were kaemferol-3-O-beta-D-glucosyl-(2-->1)-beta-D-glucoside (1), kaemferol-3,4'-di-O-beta-D-glucoside (2), quercetin-3-O-beta-D-glucosyl-(2-->1)-beta-D-glucoside (3), nicotinic acid (4), nicotinamide (5), trans-p-coumaric acid-4-O-beta-D-glucopyranoside (6), kaemferol (7), beta-sitosterol (8) and 5-hydroxymethylfurfural (9).


CONCLUSIONS
Compounds 1-6 were isolated from the bee-collected rape pollen for the first time.
Guo
Juanli
J
College of Food Science and Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China.
Zhang
Peicheng
P
Zhang
Zhiwu
Z
D000818:Animals; D001516:Bees / Q000502:physiology; D029688:Brassica napus / Q000737:chemistry* / Q000502:physiology; D003373:Coumaric Acids / Q000737:chemistry; D003911:Dextrans / Q000737:chemistry; D005960:Glucosides / Q000737:chemistry; D015394:Molecular Structure; D010936:Plant Extracts / Q000494:pharmacology; D011058:Pollen / Q000737:chemistry / Q000502:physiology*; D011422:Propionates; D012855:Sitosterols / Q000737:chemistry
D003373:Coumaric Acids; D003911:Dextrans; D005960:Glucosides; D010936:Plant Extracts; D011422:Propionates; D012855:Sitosterols; C025473:gamma-sitosterol; C025614:sephadex; C495469:p-coumaric acid