AIDS-137425 AIDS137425 Decanedioic acid 3,4-dihydroxy-5-(6-hydroxy-purin-9-yl)-tetrahydro-furan-2-ylmethyl ester 3,4-dihydroxy-5-(6-methylene-3,6-dihydro-purin-9-yl)-tetrahydro-furan-2-ylmethyl ester NSC641544