吡啶 、
2',3',5'-tri-O-acetyl-O6-(2,4,6-triisopropylbenzenesulfonyl)-N2-tritylguanosine 反应 120.0h,
以48%的产率得到2,4,6-Triisopropyl-benzenesulfonate1-[9-((2R,3R,4R,5R)-3,4-diacetoxy-5-acetoxymethyl-tetrahydro-furan-2-yl)-2-(trityl-amino)-9H-purin-6-yl]-pyridinium;