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An outbreak caused by 2019 novel coronavirus (2019-nCoV) was first identified in Wuhan City, Hubei Province, China. The new virus was later named SARS-CoV-2. The virus has affected tens of thousands of patients in the world. The infection of SARS-CoV-2 causes severe pneumonia and even death. It is urgently needed to find a therapeutic method to treat patients with SARS-CoV-2 infection. Studies showed that the surface spike (S) protein is essential for the coronavirus binding and entry of host cells. The heptad repeats 1 and 2 (HR1 and