Patent ID: 7915276

Claim:
A berberrubine derivative represented by the following formula (1) or a pharmaceutically acceptable salt thereof: wherein R 1 is benzyl or substituted benzyl; R 2 is ketone (═O) or OR, wherein R is C 3 -C 10 alkyl, C 1 -C 10 haloalkyl, C 1 -C 10 hydroxyalkyl, C 2 -C 10 alkenyl, benzyl or substituted benzyl; and the substituted benzyl has 1 to 4 substituents selected from halogen atom, C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy and C 1 -C 6 haloalkoxy.