Lenacapavir (GS-6207) is a HIV-1 capsid inhibitor. Lenacapavir shows anti-HIV activity with an EC 50 of 100 pM in MT-4 cells. Lenacapavir displays a mean EC 50 of 50 pM (20-160 pM) against 23 HIV-1 clinical isolates from different subtypes in peripheral blood mononuclear cells (PBMCs). Lenacapavir is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.