Compound         Fluorescence (340/430 nm) Control   1 1019 ± 32.18b 2 1001 ± 24.66 3 943 ± 19.56 4 1167 ± 34.12 b 5 1282 ± 41.28c 6 1201± 32.17 a, 7 1310 ± 28.17 b 8 876 ± 25.76   AG 942 ± 16.51 Data are mean ± standard deviation of triplicate tests. Fluorescence of samples was measured at excitation 330 and emission 415 nm. AG (aminoguanidine) positive control at 10 μM. ap< 0.05, bp< 0.01, cp< 0.001; vs control aminoguanidine.

Table 3: Inhibitory effect of 1-8 on the last stage of protein glycation.