| 摘要 |
Disclosed is a hydroquinone derivative or a pharmaceutically acceptable salt thereof, the hydroquinone derivative being represented by formula (I): <CHEM> wherein R<1> is a phenyl group which is unsubstituted or substituted with a substituent or substituents each independently selected from the group consisting of a halogen atom, a C1-4 alkyl group and a C1-4 alkoxy group; R<2> is a hydrogen atom or a C1-4 alkyl group; each of R<3> and R<4> is independently a hydrogen atom or a C1-4 alkyl group; R<5> is a hydrogen atom or a C1-4 alkyl group; each of R<6>, R<7> and R<8> is independently a hydrogen atom or a C1-4 alkyl group; P is a hydroxyl group; Q is a hydroxyl group, a C1-4 alkoxy group, a C1-18 acyloxy group or an oxo group; P may form together with Q an ether bond; R is a hydroxyl group, a C1-4 alkoxy group, a C1-18 acyloxy group or an oxo group, provided that when one of said Q and said R is an oxo group, the other is also an oxo group; X is a single bond, an -NR<10>- group or a -CH2-NR<10>- group in which R<10> is a hydrogen atom or a C1-4 alkyl group; Y is a methylene group or a carbonyl group; and dotted bonds in a six membered ring represent that said six membered ring has the maximum number of double bonds. |
