You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3-butyl-7-methyl-2,6-dioxopurin-8-yl)methyl (Z)-2-cyano-3-[2,5-dimethyl-1-(3-methylbutyl)pyrrol-3-yl]prop-2-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H34N6O4
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