highly significantp < 0.01
However, there is a highly significant linear correlation between amounts of ribose and glucose and the rising concentrations of norharman ( r = 0.92, p < 0.01 and r = 0.98, p < 0.001, respectively) and harman ( r = 0.98, p < 0.001 and r = −0.72, p < 0.05, respectively).