| 摘要 |
<p>The present invention relates to a process for preparing a compound of Formula (III), or a salt thereof; wherein R1 is C1-6 alkyl; R2 and R3 are each independently hydrogen or C1-4 alkyl, or R2 and R3 combine together with the nitrogen atom to which they are attached to form a pyrrolidine ring, a morpholine ring, a piperidine ring, or a piperazine ring; and n is 1, 2 or 3.</p> |
