You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[[4-cyano-7-(4-propan-2-ylphenyl)-2,3-dihydrofuro[2,3-c]pyridin-5-yl]amino]methyl]prop-2-enoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H21N3O3
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