Isolation and structure of woodorien, a new glucoside having antiviral activity, from Woodwardia orientalis

Hot aqueous and methanol extracts of the rhizomes of Woodwardia orientalis were tested for their in vitro Antiviral activity against herpes simplex virus type 1 (HSV-1), poliovirus type 1, and measles virus by plaque reduction assay. The aqueous extract of W. orientalis reduced the plaque forming ability of HSV-1 and poliovirus more strongly than did the methanol extract. By bioassay-directed fractionation of the aqueous extract, a new glucoside, woodorien (1), along with five known compounds were isolated from an EtOAc-soluble fraction that had Antiviral activity. The structures of these compounds were determined by the use of two dimensional (2D) NMR techniques (1H-1H correlation spectroscopy (COSY), 1H-13C COSY and heteronuclear multiple-bond multiple-quantum coherence (HMBC)). Woodorien (1) was the most potent inhibitor against HSV-1 among the isolated compounds.