You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name propan-2-yl (1R,5S,6S,7S)-3-(2-methylphenyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxylate into its molecular formula.
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C19H21NO4
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