4H-Furo[3,2-d]-1,3,2-dioxaphosphorin-7-ol, 6-(6-amino-8-chloro-9H-purin-9-yl)tetrahydro-2-hydroxy-, 2-oxide, (4aR,6R,7R,7aS)- 8-Cl-cAMP AIDS-212161 AIDS212161