A new phloroglucinol diglycoside derivative from Hypericum japonicum Thunb

Area of Science:

• Phytochemistry
• Pharmacology

Background:

• Hypericum japonicum Thunb. is a plant with potential medicinal properties.
• Phloroglucinol diglycosides are a class of compounds with diverse biological activities.

Purpose of the Study:

• To isolate and characterize new compounds from Hypericum japonicum Thunb.
• To evaluate the in vivo antihypoxic activity of Hypericum japonicum Thunb. extracts.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation of the new compound using spectroscopic methods (NMR, MS).
• In vivo antihypoxic activity assay in mice using different solvent extracts.

Main Results:

• A new phloroglucinol diglycoside, 4,6-dimethyl-5-O-[alpha-L-rhamnopyranosyl-(1-->6)-alpha-D-glucopyranosyl] multifidol, was identified.
• Eight known compounds were also isolated and identified.
• The ethyl acetate (EtOAc) extract of Hypericum japonicum Thunb. exhibited the most potent antihypoxic activity in a mouse model.

Conclusions:

• Hypericum japonicum Thunb. contains a novel phloroglucinol diglycoside.
• The EtOAc extract of this plant possesses significant antihypoxic properties, warranting further investigation for drug development.