Patent ID: 7129381

Claim:
A benzylphenol derivative represented by the general formula: wherein R 11 represents a hydrogen atom, a protected hydroxy group, a protected amino group, a protected mono(lower alkyl)amino group, a di(lower alkyl)amino group, a carbamoyl group, a lower alkyl group, a lower alkoxy group, a protected hydroxy(lower alkyl) group, a protected hydroxy(lower alkoxy) group, a lower alkoxy-substituted (lower alkyl) group, a lower alkoxy-substituted (lower alkoxy) group, a carbamoyl(lower alkyl) group, a lower alkoxycarbonyl-substituted (lower alkyl) group, a lower alkoxycarbonyl-substituted (lower alkoxy) group, a carboxy-(lower alkyl) group or a carboxy(lower alkoxy) group; R 12 represents a hydrogen atom or a lower alkyl group; and R 13 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 hydroxyl(lower alkylthio) group, a lower alkoxy-substituted (lower alkyl) group, a lower alkoxy-substituted (lower alkoxy) group, a lower alkoxy-substituted (lower alkylthio) group, a lower alkenyloxy group, an aralkyloxy group, a protected hydroxy(lower alkenyl) group, a carboxy group, a lower alkoxycarbonyl group, a cyano group, an aralkyloxy(lower alkyl) group, a carbamoyl group, a carbamoyl(lower alkyl) group, a protected mono(lower alkyl)amino group, a di(lower alkyl)amino group, a lower alkoxycarbonyl-substituted (lower alkyl) group, a lower alkoxycarbonyl-substituted (lower alkoxy) group, a carboxy(lower alkyl) group or a carboxy(lower alkoxy) group; with the proviso that: R 13 does not represent 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 when R 11 represents a hydrogen atom or a protected hydroxy(lower alkyl) group R 12 represents a hydrogen atom, or a salt thereof.