Phosphoric acid 6-amino-hexyl ester (2R,3S,4R,5R)-5-(2-amino-6-oxo-1,6-dihydro-purin-9-yl)-3,4-dihydroxy-tetrahydro-furan-2-ylmethyl ester 、 sodium 1-({3-[(2-{5-[(3aS,4S,6aR)-2-oxo-hexahydro-1H-thieno[3,4-d]imidazolidin-4-yl]pentanamido}ethyl)disulfanyl]propanoyl}oxy)-2,5-dioxopyrrolidine-3-sulfonate 在
potassium dihydrogenphosphate 作用下,
以50%的产率得到Phosphoric acid (2R,3S,4R,5R)-5-(2-amino-6-oxo-1,6-dihydro-purin-9-yl)-3,4-dihydroxy-tetrahydro-furan-2-ylmethyl ester 6-(3-{2-[5-((3aR,6S,6aS)-2-oxo-hexahydro-thieno[3,4-d]imidazol-6-yl)-pentanoylamino]-ethyldisulfanyl}-propionylamino)-hexyl ester