You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[3-methyl-5-[(E)-2-[5-(propylsulfamoyl)thiophen-2-yl]ethenyl]-1,2-oxazol-4-yl]propanamide into molecular formula.
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C16H21N3O4S2
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