[Studies on phloroglucinol derivatives of Dryopteris fragrans L]

To study the phloroglucinol derivatives of Dryopteris fragrans.

Isolation and purification were carried out on repeated silica gel, Sephadex LH-20 column chromatography and prepare HPLC. The structures of the compounds were determined by physicochemical properties and spectral analysis.

Four compounds were isolated and identified as aspidin PB (I), dryofragin (II), aspidinol (III), aspidin BB (IV).

Compounds IV is isolated from this plant for the first time.