| 摘要 |
<p>The invention provides PDE9-inhibiting compounds of Formula (I), and pharmaceutically acceptable salts thereof, wherein R1, R2, R3, A1 and n are as defined herein. Pharmaceutical compositions containing the compounds of Formula I, and uses thereof in treating neurodegenerative and cognitive disorders, such as Alzheimer's disease and schizophrenia, are also provided. A method of processing an aqueous fluid produced from a wellbore in order to collect or remove a minor constituent therefrom, comprises adding one or more solutes to the aqueous fluid so as to form an aqueous mixture which separates into two aqueous phases in contact with each other, with a first solute present at a greater concentration in the larger, first aqueous phase than in the second aqueous phase and a second solute present at a greater concentration in the smaller, second aqueous phase than in the first aqueous phase; while the compositions of the two phases are such that the said minor constituent preferentially partitions into the smaller, second aqueous phase so that the concentration of that constituent in the smaller second phase exceeds its concentration in the larger first aqueous phase. The second aqueous phase with the said constituent concentrated therein is then separated from the first aqueous phase. The process may be used to concentrate a tracer, such as an organic dye, into a reduced volume which can be transported to a remote laboratory. The process may alternatively be used to remove a contaminant or other minor constituent, so as to allow the first aqueous phase to be put to use, eg for cementing or hydraulic fracturing. The invention provides PDE9-inhibiting compounds of Formula (I), and pharmaceutically acceptable salts thereof, wherein R1, R2, R3, A1 and n are as defined herein. Pharmaceutical compositions containing the compounds of Formula I, and uses thereof in treating neurodegenerative and cognitive disorders, such as Alzheimer's disease and schizophrenia, are also provided.</p> |
