Discovery of potential small molecular SARS-CoV-2 entry blockers targeting the spike protein.

"Competing interests The authors declare no competing interests."

"We greatly thank Dr. Guo from Nan Kai University and the National Protein Center of China for providing protein samples. This work was supported by the Science and Technology Commission of Shanghai Municipality grants (Grant IDs: 20431900102, 20431900100, 20430780300, 21920102003 and 2043190012); the National Science and Technology Major Project “Key New Drug Creation and Manufacturing Program”, China (Grant ID: 2018ZX09711002); National Natural Science Foundation of China (No. 21920102003); Shanghai Science and Technology Development Funds (Grant ID: 20QA1406400); the Youth Innovation Promotion Association CAS (grants 2018367 to LKZ); as well as the startup package from ShanghaiTech University."