ASF-006 sodium, a tetrapodal tryptophan derivative, is a potent viral invasion inhibitor. ASF-006 sodium shows potent antiviral activity against different SARS-CoV-2 Omicron variants but not against the ancestral SARS-CoV.2 strain (Wuhan-Hu-1). ASF-006 sodium competitively inhibits receptor-binding domain (RBD)-ACE2 binding via an allosteric mechanism. ASF-006 sodium inhibits Omicron BA.1, Omicron XBB.1.5, respiratory syncytial virus (RSV) and Ebola virus infection with IC50s of 0.02 µM, 0.3 µM, 1.52 µM and 0.2 µM, respectively. ASF-006 sodium inhibits cell entry of both HIV and enterovirus A71[1].
