You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(1,3-benzodioxol-5-ylmethyl)-3-(4-methoxyphenyl)-4-propan-2-ylsulfanylpyrrole-2,5-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H21NO5S
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