You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(2R,3R,4R,5R)-3,4-diacetyloxy-5-[6-(4-phenylpiperazin-1-yl)purin-9-yl]oxolan-2-yl]methyl acetate into its molecular formula.
user
C26H30N6O7
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