A compound or a pharmacologically acceptable salt thereof, wherein the compound is of formula: wherein: each R is independently a C 1-3 alkyl group, or each R is bonded together to form a C 2-5 alkylene group; R 1, R 2, and R 3 are each independently a substituted or unsubstituted linear or branched C 1-4 alkyl group; A is a substituted or unsubstituted C 6-10 aryl group or a substituted or unsubstituted heteroaryl group; Z is a hydrogen atom or a substituted or unsubstituted C 1-6 alkyl group; or A and Z are bonded to each other, with the group represented by Z-N-A to form a substituted or unsubstituted bicyclic fused heteroaryl group; wherein the substituent in a 'substituted' A, Z, R 1, R 2, R 3 group is one or more selected from: (i) a linear or branched C 1-6 alkyl group, a C 3-6 cycloalkyl group, a linear or branched C 2-6 alkenyl group, a C 3-6 cycloalkenyl group, a linear or branched C 2-6 alkynyl group, a linear or branched C 1-6 alkoxy group, a C 3-6 cycloalkoxy group, a halogen atom, a hydroxyl group, a cyano group, an oxo group, an amino group, a nitro group, a carboxy group, a carbamoyl group, a C 6-10 aryl group, and a heterocyclic group; or (ii) where A, Z, R 1, R 2, or R 3 has two or more substituent groups, two substituent groups are bonded to form a cyclopropyl group, a methylenedioxy group, or an oxyethylene group, optionally wherein the methylenedioxy group or oxyethylene group is bonded to a benzene ring in the compound to form a 1,3-benzodioxole group or 2,3-dihydrobenzofuranyl group, respectively; and wherein the substituent is unsubstituted or is further substituted with one or more of a halogen atom, a hydroxyl group, an amino group, a cyano group, an oxo group, a linear or branched C 1-6 alkyl group, a C 1-6 alkoxy group, a C 6-10 aryl group, or a heterocyclic group. each R is independently a C 1-3 alkyl group, or each R is bonded together to form a C 2-5 alkylene group; R 1, R 2, and R 3 are each independently a substituted or unsubstituted linear or branched C 1-4 alkyl group; A is a substituted or unsubstituted C 6-10 aryl group or a substituted or unsubstituted heteroaryl group; Z is a hydrogen atom or a substituted or unsubstituted C 1-6 alkyl group; or A and Z are bonded to each other, with the group represented by Z-N-A to form a substituted or unsubstituted bicyclic fused heteroaryl group; wherein the substituent in a 'substituted' A, Z, R 1, R 2, R 3 group is one or more selected from: (i) a linear or branched C 1-6 alkyl group, a C 3-6 cycloalkyl group, a linear or branched C 2-6 alkenyl group, a C 3-6 cycloalkenyl group, a linear or branched C 2-6 alkynyl group, a linear or branched C 1-6 alkoxy group, a C 3-6 cycloalkoxy group, a halogen atom, a hydroxyl group, a cyano group, an oxo group, an amino group, a nitro group, a carboxy group, a carbamoyl group, a C 6-10 aryl group, and a heterocyclic group; or (ii) where A, Z, R 1, R 2, or R 3 has two or more substituent groups, two substituent groups are bonded to form a cyclopropyl group, a methylenedioxy group, or an oxyethylene group, optionally wherein the methylenedioxy group or oxyethylene group is bonded to a benzene ring in the compound to form a 1,3-benzodioxole group or 2,3-dihydrobenzofuranyl group, respectively; and (i) a linear or branched C 1-6 alkyl group, a C 3-6 cycloalkyl group, a linear or branched C 2-6 alkenyl group, a C 3-6 cycloalkenyl group, a linear or branched C 2-6 alkynyl group, a linear or branched C 1-6 alkoxy group, a C 3-6 cycloalkoxy group, a halogen atom, a hydroxyl group, a cyano group, an oxo group, an amino group, a nitro group, a carboxy group, a carbamoyl group, a C 6-10 aryl group, and a heterocyclic group; or (ii) where A, Z, R 1, R 2, or R 3 has two or more substituent groups, two substituent groups are bonded to form a cyclopropyl group, a methylenedioxy group, or an oxyethylene group, optionally wherein the methylenedioxy group or oxyethylene group is bonded to a benzene ring in the compound to form a 1,3-benzodioxole group or 2,3-dihydrobenzofuranyl group, respectively; and wherein the substituent is unsubstituted or is further substituted with one or more of a halogen atom, a hydroxyl group, an amino group, a cyano group, an oxo group, a linear or branched C 1-6 alkyl group, a C 1-6 alkoxy group, a C 6-10 aryl group, or a heterocyclic group.