Topiramate97240-79-4100 % similar 4,5-Desisopropylidene topiramate106881-41-864 % similar 2,3:4,5-Di-O-isopropylidene-β-D-fructopyranose20880-92-657 % similar Diacetone L-sorbose17682-70-148 % similar 1,2:5,6-Bis-O-(1-methylethylidene)-α-D-gulofuranose14686-89-633 % similar 1,2:5,6-Bis-O-(1-methylethylidene)-α-D-allofuranose2595-05-333 % similar Diacetone-D-glucose582-52-533 % similar 3-O-Acetyl-1,2:5,6-di-O-isopropylidene-α-D-glucofuranose16713-80-732 % similar