You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1S,2S,4R,5S,6S,7R)-7-[(2,4,6-trimethylphenyl)carbamoyl]tricyclo[3.2.2.02,4]non-8-ene-6-carboxylic acid into its molecular formula.
user
C20H23NO3
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