Figure 6. Structures and effective concentrations of nicotiflorin, rutin, and quercitrin against the three stresses. Note the difference in side chains enclosed by rectangles. P-value<0.05 by calculated in Dunnett's tests compared to stress only. The result showed that neuroprotective concentration of quercitrin is different with nicotiflorin and rutin. It is shown that different structures of changing side chain induced different concentrations of neuroprotection.