Patent ID: 7045665

Claim:
A benzylphenol derivative represented by the general formula: wherein R 11 represents a hydrogen atom or a protected hydroxy(lower alkyl) group; and R 12 represents a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a protected hydroxy(lower alkyl) group, a protected hydroxy(lower alkoxy) group, a protected hydroxy(lower alkylthio) group, a lower alkoxy-substituted (lower alkyl) group, a lower alkoxy-substituted (lower alkoxy) group or a lower alkoxy-substituted (lower alkylthio) group; with the proviso that R 12 is not a methyl group, an ethyl group, an isopropyl group, a tert-butyl group or a methoxy group when R 11 is a hydrogen atom, or a salt thereof.