You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6,6-dimethyl-N-[(3-methylphenyl)methyl]-3,8-dioxo-2-phenyl-5,7-dihydroisoquinoline-4-carboxamide into its molecular formula.
user
C26H26N2O3
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