Patent ID: 8686024

Claim:
An indoline derivative or a salt thereof represented by the following formula (1): wherein R 1 represents a C 2-10 alkyl group, a cycloalkyl group, a heterocycloalkyl group, an aryl group which has a substituent, a heteroaryl group, an aryl C 1-6 alkyl group, a heteroaryl C 1-6 alkyl group, a cycloalkyl C 1-6 alkyl group, a heterocycloalkyl C 1-6 alkyl group, a dihydrofuryl C 1-6 alkyl group, a C 1-6 alkenyl group, a tetrahydronaphthyl group, or an indanyl group which may have a substituent; R 2 represents an aryl C 1-6 alkyl group, a cycloalkyl C 1-6 alkyl group, a heteroaryl C 1-6 alkyl group, or a heterocycloalkyl C 1-6 alkyl group which may have a substituent; R 3 each independently represents a hydrogen atom, or a C 1-10 alkyl group or a dialkylaminocarbonyl group which may have a substituent; R 4 each independently represents a hydrogen atom, or a C 1-10 alkyl group which may have a substituent; and R 5 represents a hydrogen atom, or a C 1-6 alkyl group which may have a substituent, provided that R 1 and R 5 are not a methyl group at the same time if R 4 are both a methyl group.