1. A compound represented by any of the chemical formula 1 wherein R 1 , R 2 , and R 3 are each independently a hydrogen atom, a halogen atom, or an aliphatic hydrocarbon group having a carbon number of from 1 to 10, the chemical formula 2 wherein R 1 , R 2 , and R 3 are each independently a hydrogen atom, a halogen atom, or an aliphatic hydrocarbon group having a carbon number of from 1 to 10, and n is an integer of 1 or more, or the chemical formula 3 wherein R 1 , R 2 , and R 3 are each independently a hydrogen atom, a halogen atom, or an aliphatic hydrocarbon group having a carbon number of from 1 to 10, and n is an integer of 1 or more, and or a pharmaceutically acceptable salt thereof ,

2. A GAPDH aggregation inhibitor including as an active ingredient one or more compounds selected from the group consisting of a compound represented by any of the chemical formula 1 wherein R 1 , R 2 , and R 3 are each independently a hydrogen atom, a halogen atom, an aliphatic hydrocarbon group having a carbon number of from 1 to 10, the chemical formula 2 wherein R 1 , R 2 , and R 3 are each independently a hydrogen atom, a halogen atom, or an aliphatic hydrocarbon group having a carbon number of from 1 to 10, and n is an integer of 1 or more, or the chemical formula 3 wherein R 1 , R 2 , and R 3 are each independently a hydrogen atom, a halogen atom, or an aliphatic hydrocarbon group having a carbon number of from 1 to 10, and n is an integer of 1 or more, and a pharmaceutically acceptable salt thereof ,