You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-methyl-6-[8-(2-methylcyclohex-3-ene-1-carbonyl)oxynaphthalen-1-yl]cyclohexa-2,4-diene-1-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H26O4
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