Provided is a compound represented by the Formula (I) having a HER2 inhibitory action or a pharmacologically acceptable salt thereof,wherein T1 is a phenyl group, an indazolyl group, or a benzofuryl group, n is an integer of 0 to 3, R1 is a hydrogen atom, a halogen atom, a C1-4 alkyl group, a C2-6 alkenyl group, a C2-6 alkynyl group, or a C1-4 alkoxy group, m is an integer of 0 to 3, R2 is a hydroxy group or a C1-4 alkyl group optionally substituted with one or two C1-4 alkoxy groups, and R3 is a hydrogen atom, a C1-4 alkyl group, or a C2-6 alkynyl group.
