Chemical constituents of the leaf of Amoora gigantea Pierre ex. Laness

Abstract

Dried and ground leaf of Amoora gigantean Pierre ex. Laness were extracted with hexane, giving a greenish-brown sticky liquid. The residue was further extracted with methanol, giving a greenish-black crude extract. The both crude extracts then were separated by column chromatography and ten compounds were obtained. These isolated compounds were established on the basis of physical properties and spectral evidences. Eight compounds can be identified, they were a mixture of long chain hydrocarbons (C₂₂-₂₄, C₂₇-₃₃), long chain ester (Octadecyl eicosanoate(C₃₄H₆₈O₂)), 5α-dammara-20(21),24-dien-3-one, a mixture of long chain alcohol (C₃₂-₃₃), 5α-dammara-20(21),24-dien-3β-ol, a mixture of steroid (stigmasterol and β-sitosterol), a mixture of (stigmasterol-3-O-β -D-glucopyranoside, and β-sitosterol-3-O-β –D-glucopyranoside), and tetratriacontanoic acid (C₃₄H₆₈O₂). The other two substances cannot be identified due to the limited amount. This is the first report ever known about the chemical constituents of this particular plant species.