[Studies on involatile constituents of Mentha haplocalyx]

To promote its comprehensive utilization, the involatile constituents of Mentha haplocalyx were studied systematically.

The chemical components were isolated and purified by silca gel column chromatography and recrystallization. The chemical structures were elucidated on the basis of physico-chemical properties and spectral data.

Eight compounds were isolated and identified as: acacetin (I), tilianine (II), linarin (III), n-butyl-beta-D-fructopyranoside (IV), ursolic acid (V), oleanolic acid (VI), beta-sitosterol (VII), daucosterol (VIII).

Compounds I approximately V were obtained from this plant for the first time.