| abstract |
The present invention provides an excellent sigma receptor binding agent and/or acetylcholinesterase inhibitor containing an (1-indanone)-(1,2,3,6-tetrahydropyridine) compound. More specifically, it provides an (1-indanone)-(1,2,3,6-tetrahydropyridine) compound represented by the following formula, a pharmacologically acceptable salt thereof or a hydrate thereof: n n n In the formula (I), R 1 , R 2 , R 3 and R 4 are the same as or different from each other. |