Patent ID: 8367666

Claim:
A compound of the formula (I): wherein, R 1 is C1-C8 alkyl optionally substituted with one to three substituents chosen from halogen, C3-C8 cycloalkyl, and C6-C14 aryl optionally substituted with one or two substituents selected from substituent group F; R 2 is C1-C6 alkyl or C1-C6 alkoxy C1-C6 alkyl; R 3 is C1-C6 alkyl or C1-C6 alkoxy; R 4 is hydrogen or hydroxy; G is a group represented by formula: wherein R 5 is hydrogen; X 1 is a single bond; X 2 is C3-C8 cycloalkanediyl optionally substituted with one or two substituents selected from substituent group C, C3-C8 cycloalkenediyl optionally substituted with one or two substituents selected from substituent group C, aryldiyl optionally substituted with one or two substituents selected from substituent group C, heteroaryldiyl optionally substituted with one or two substituents selected from substituent group C, or non-aromatic heterocyclediyl optionally substituted with one or two substituents selected from substituent group C; X 3 is a single bond or C1-C4 alkylene; Y is —O—; Z is hydrogen; substituent group C: halogen, C1-C8 alkyl, halo C1-C8 alkyl, C1-C8 alkoxy, halo C1-C8 alkoxy, oxo, cyano, azide, nitro, and phenyl; substituent group F: halogen, C1-C8 alkyl, halo C1-C8 alkyl, hydroxy, C1-C8 alkoxy, halo C1-C8 alkoxy, methylenedioxy, benzyloxy, carbamoyl optionally substituted with one or two C1-C8 alkyl, cyano, azide, nitro, oxo, and phenyl; or a pharmaceutically acceptable salt thereof.