RETRACTED: Design, Synthesis, and Biological Evaluation of Notopterol Derivatives as Triple Inhibitors of AChE/BACE1/GSK3β for the Treatment of Alzheimer’s Disease - Nan Wang; Wenjie Liu; Lijun Zhou; Wenwu Liu; Xu Liang; Xin Liu; Zihua Xu; Tianming Zhong; Qiong Wu; Xinming Jiao; Jiangxia Chen; Xinyue Ning; et al. (ACS Omega)