1 FDT (7r)-6-formyl-7-(1-methyl-1h-1,2,3-triazol-4-yl)-4,7-dihydro-1,4-thiazepine-3-carboxylic acid 1.000 2 17O (7r)-6-formyl-7-(4h-pyrazolo[1,5-C][1,3]thiazol-2-yl)-4,7-dihydro-1,4-thiazepine-3-carboxylic acid 0.727