Contents 1. Drug discovery and drug design 2. Biological characterization 3. Early formulation studies 4. The investigational New Drug(IND) Application(研究性新药申请) 5. The New Drug Application( NDAContents 1. Drug discovery and drug design 2. Biological characterization 3. Early formulation studies 4. The investigational New Drug (IND) Application(研究性新药申请） 5. The New Drug Application (NDA)