[Chemical constituents from the leaves of crataegus pinnatifida Bge. var. major N.E.Br].
OBJECTIVE
To study the chemical constituents in the leaves of Crataegus pinnatifida Bge. var. major N.E.Br..


METHODS
Compounds were isolated by using porous resin, silica gel, polyamide chromatographic techniques etc. Their structures were elucidated by chemical and spectroscopic methods.


RESULTS
Eight compounds were identified as pinnatifin I (1), quercetin (2), 3-O-beta-D-glucopyranosyl quercetin (3), 3-O-beta-D-galacopyranosyl quercetin (4), 3-O-beta-D-glucopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (5), 3-O-beta-D-galacopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (6), kaempferol (7), 7-O-alpha-L-rhamnosyl-3-O-beta-D- glucopyranosyl kaempferol (8).


CONCLUSIONS
Compound 1 is a new compound. Compound 8 was isolated from this plant for the first time.
Zhang
P C
PC
Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China. pczhang@imm.ac.cn
Xu
S X
SX
D027825:Crataegus / Q000737:chemistry*; D044950:Flavanones / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification; D013141:Spiro Compounds / Q000737:chemistry / Q000302:isolation & purification*
D044950:Flavanones; D044949:Kaempferols; D013141:Spiro Compounds; C481184:pinnatifin I; C006552:kaempferol; D011794:Quercetin