3-Methyl-3-(3-(2-methyl-2-(3-(2-methyl-2-(3-(1-methyl-1-(2-methyl-1,3-dioxolan-2-yl)ethyl)-5-isoxazolyl)propyl)-5-isoxazolyl)propyl)-5-isoxazolyl)butanenitrile AIDS-149400 AIDS149400 NSC683840