You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[9-[(2R,3S,5R)-4-hydroxy-5-(hydroxymethyl)-3-methyl-3-(phenylmethoxymethoxy)oxolan-2-yl]purin-6-yl]benzamide into molecular formula.
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C26H27N5O6
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