To compare results for bucket A we leveraged ExcelConstructor. In the created spreadsheet, the original image and the images generated from the predictions for each method are available in one row to facilitate quality control for the chemists (Fig. ). To qualify single molecules, the Excel sheet is a good way but fails for multi structure (Bucket B) and reaction images (Bucket C) as they become very crowded. Therefore, a Java program ImageComparator was written . ImageComparator reads a CSV file with the image location in the first column and the respective SMILES output in the second column to generate a tabular view of input images and predicted structures. These table rows can be inspected and given a score that can be stored for later control, see figure .