The present invention relates to spiro2H-1-benzopyran-2,4\u2032-piperidine derivatives having general formula, or a pharmaceutically acceptable salt thereof. The system and method for data verification using a smart phone generally includes a mobile device, a central validating server, and an activation client. A press station downwardly presses the batch with an upper platen and presses the batch in a downstream direction onto the continuous wood panel with a clamping device. If further prototype database reduction is desired, the technique identifies and removes one or more prototypes that have the least adverse effect on the error rate across all spaces.