Pharmacokinetics of Nuciferine and N-Nornuciferine, Two Major Alkaloids From Nelumbo nucifera Leaves, in Rat Plasma and the Brain oleh Lin-Hu Ye, Lin-Hu Ye, Xiao-Xi He, Chang You, Xue Tao, Li-Sha Wang, Meng-Di Zhang, Yun-Feng Zhou, Qi Chang