[Studies on the triterpenes from loquat leaf (Eriobotrya japonica)].
OBJECTIVE
To investigate the chemical constituents from Loquat leaf (Eriobotrya japonica).


METHODS
Compounds were isolated by a combination of silica gel and ODS column chromatographies and preparative TLC and HPLC, their structures were identified by chemical and spectral methods.


RESULTS
Nine triterpenes were isolated and identified as methyl betuliate (I), oleanolic acid (II), ursolic acid (III), methyl maslinate (IV), methyl corosolate, (methyl 2alpha-3alpha-dihydroxyurs-12-en-28-oate, V), maslinic acid (VI), corosolic acid (VII), tormentic acid (VIII), euscaphic acid (IX) from loquat leaf.


CONCLUSIONS
Compounds I and V are obtained from this plant and Eriobotrya genus for the first time.
Lv
Han
H
Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, Nanjing 210014, China.
Chen
Jian
J
Li
Wei-Lin
WL
Zhang
Han-Qing
HQ
D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D027824:Rosaceae / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000097245:Ursolic Acid
D009828:Oleanolic Acid; D014315:Triterpenes; D000097245:Ursolic Acid; C077960:methyl maslinate; C113861:corosolic acid; C412811:maslinic acid