FLAVONOIDS IN ROSMARINUS-OFFICINALIS LEAVES

Three new flavonoid glucuronides, luteolin 3'-O-beta-D-glucuronide, lu teolin 3'-O-(4''-O-acetyl)-beta-D-glucuronide, and luteolin 3'-O-(3''- O-acetyl)-beta-D-glucuronide, together with hesperidin, were isolated from 50% aqueous MeOH extract of the leaves of rosemary. The structure s were established by chemical and spectroscopic methods. Their antiox idant activities were evaluated by a ferric thiocyanate method with he speridin showing the greatest activity.