Theravalues Corporation

Jun Shao

Noriaki Shinobu

Masataka Kobayashi

Takao Mori

A compound or a pharmaceutically acceptable salt thereof of the present invention is represented by the following general formula (I): [wherein, Rto Rmay have a hydrogen atom, a halogen atom, a hydroxy group, a C1-C6 alkyl group, a C2-C8 alkenyl group, a C1-C6 alkylcarbonyl group or &#x2014;COOR(wherein Rrepresents a hydrogen atom, a C1-C6 alkyl group or a C2-C8 alkenyl group) as a substituent; and X represents a sulfur atom, an oxygen atom or NR(wherein Rrepresents a hydrogen atom, a halogen atom, a hydroxy group, a C1-C6 alkyl group, a C2-C8 alkenyl group or a C1-C6 alkoxy group)].

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Sapporo, Japan

Jun Shao