(E)-5-(2-cyanoethenyl)tubercidin 3-[4-Amino-7-(3,4-dihydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-7H-pyrrolo[2,3-d]pyrimidin-5-yl]-acrylonitrile 76319-82-9 AIDS-187697 AIDS187697