Preclinical development of new drug encompasses all of the activities that must take place before a new chemical entity can be administered to human. Lead Screening Cell lines and compound tests animal models Preclinical drug development Optimal drug candidate Clinical testing Human 2019/8/28 Institute of clinical pharmacology,AHMU 8Lead compound Screening tests Cell lines and animal models Preclinical drug development Preclinical development of new drug encompasses（包 含） all of the activities that must take place before a new chemical entity can be administered to human. 2019/8/28 Institute of clinical pharmacology, AHMU 8 Optimal drug candidate Clinical testing development Human