You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3S,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3-[[(2R,3S,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3-[[(2R,3S,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3-phosphonooxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxyoxolan-2-yl] [(2R,3S,5R)-2-[[3,4-bis(phenylmethoxy)phenyl]methoxymethyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] hydrogen phosphate is the IUPAC name of a molecule. Please give its molecular formula.
user
C60H67N17O28P4
assistant