Discovery of a Novel Potent Antitumor Molecule, P19G1, by Erlotinib Derivative Libraries Synthesized by Modular Click-Chemistry oleh Qianfei Cui PhD, Peng Song PhD, Tiancheng Ma PhD, Zefeng Wang PhD, Xiaojing Lu MS, Yongjia Shi MS, Fang Zhang PhD, Guoqiang Lin PhD, Jiajia Dong PhD, Jiange Zhang PhD