3'-Deoxyadenylyl-(2'-5')-3'-deoxyadenylyl-(2'-5')-3'-deoxy-2'-O-{[2-(2,3-di-O-hexadecylglycer-1-yloxycarbonyl)ethyl]carbonyl}adenosine AIDS-106425 AIDS106425 Cordycepin-trimer 2'-(2,3-di-O-hexadecylglyceryl succinate)