Unusual homologous long-chain alkanoic acid esters of lupeol from Koelpinia linearis

Abstract An unusual series of five long-chain alkanoic acid (C 14 C 18 ) esters of lupeol was isolated from the methanol extract of koelpinia linearis and characterized by chemical and spectroscopic methods, including 13 C NMR. The spectral assignments were achieved by APT and DEPT techniques.