Patent ID: 8026368

Claim:
A compound represented by formula (I): wherein each of R 1 and R 2 is independently a hydrogen atom, a C 1-6 alkyl group, a C 1-6 alkoxy group, a halogenated C 1-3 alkyl group, or a halogenated C 1-3 alkoxy group; R 3 is wherein each of R 8 and R 9 is independently a hydrogen atom or a C 1-6 alkyl group, wherein the C 1-6 alkyl group is optionally substituted with at least one substituent selected from the group consisting of a carboxyl group, a C 1-6 alkoxy group, and a C 2-14 aryl group, or R 8 and R 9 together are —(CH 2 ) m1 —E—(CH 2 ) m2 —, wherein E is CR 10 R 11 wherein each of R 10 and R 11 is independently a hydrogen atom or a C 1-6 alkyl group, and each of m1 and m2 is independently an integer of from 0 to 5, provided that m1+m2 is 2, 3, 4, or 5, or R 3 is wherein R 17 is a hydrogen atom or a C 1-6 alkyl group, and R 18 is an amino group, a mono- or di-C 1-6 alkylamino group, or a C 2-9 heterocyclyl group, or R 17 and R 18 together are —(CH 2 ) m3 —G—(CH 2 ) m4 —, wherein G is CR 19 R 20 , wherein R 19 is a hydrogen atom, and R 20 is an amino group, a mono- or di-C 1-6 alkylamino group, or a C 2-9 heterocyclyl group, each of m3 and m4 is independently an integer of from 0 to 5, provided that m3+m4 is 2, 3, 4, or 5, or NR 17 R 18 , as a whole, is a nitrogen-containing C 2-9 cyclyl group which is substituted with two or three substituents selected from the group consisting of a hydroxyl group, an amino group, a protected amino group, and a C 1-6 alkoxy group; R 33 is a hydrogen atom, a C 1-6 alkoxy group, a C 1-6 alkyl group, a halogenated C 1-3 alkyl group, or a halogenated C 1-3 alkoxy group; and R 34 is a phenyl group, which is optionally substituted with at least one substituent selected from the group consisting of a C 1-6 alkyl group, a halogenated C 1-6 alkyl group, a halogen atom, a C 1-6 alkoxy group, and a halogenated C 1-3 alkoxy group, or a tautomer or pharmaceutically acceptable salt of the compound.