methyl-maslinate and corosolic-acid

To investigate the chemical constituents from Loquat leaf (Eriobotrya japonica).. 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.. 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.. Compounds I and V are obtained from this plant and Eriobotrya genus for the first time.

Topics: Chromatography, High Pressure Liquid; Chromatography, Thin Layer; Molecular Structure; Oleanolic Acid; Plant Leaves; Plants, Medicinal; Rosaceae; Triterpenes; Ursolic Acid