You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-(2,4-dimethoxyphenyl)-1-[2-[1-(3-fluorophenyl)-3,4-dihydro-1H-pyrrolo[1,2-a]pyrazin-2-yl]-2-oxoethyl]-1-propan-2-ylurea into its molecular formula.
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C27H31FN4O4
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