| abstract |
8-(3-Pentylamino)-2-methyl-3-(2-chloro-4-methoxyphenyl)-6,7-dihydro-5H-cyclopenta[d]pyrazolo[1,5-a]pyrimidine methanesulfonate, a crystal thereof, a process for the preparation thereof, and a process for the preparation of an intermediate thereof is disclosed. 8-(3-Pentylamino)-2-methyl-3-(2-chloro-4-methoxyphenyl)-6,7-dihydro-5H-cyclopenta[d]pyrazolo[1,5-a]pyrimidine methanesulfonate is a compound having highly excellent thermal stability and is suitable for preparing an antagonist for Corticotropin Releasing Factor (CRF). |