| 摘要 |
The present invention provides a compound represented by general formula (I): [wherein m represents an integer of 0 to 4; R<1>, R<2>, R<3 >and R<4 >may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like; R<5 >represents hydroxy, or substituted or unsubstituted lower alkoxy; R<6 >represents a hydrogen atom or halogen; R<7 >represents hydroxy, formyl, substituted or unsubstituted lower alkoxy, or the like; and R<8 >represents a hydrogen atom, substituted or unsubstituted lower alkoxy, or the like], or a salt thereof.
|
