CAS No 103476-21-7 , 5-[2-[3-[[4-[[[5-(6-aminopurin-9-yl)-4-hydroxy-3-phosphonooxyoxolan-2-
yl]methoxy-hydroxyphosphoryl]oxy-hydroxyphosphoryl]oxy-2-hydroxy-3,
3-dimethylbutanoyl]amino]propanoylamino]ethylsulfanyl]-3-hydroxy-3-
methyl-5-oxopentanoic acid