You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(benzenesulfonyl)-N-[2-[4-(trifluoromethyl)-7,8-dihydro-5H-pyrano[4,3-d]pyrimidin-2-yl]ethyl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20F3N3O4S
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