You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [5-ethyl-2-[7-[(4-fluorophenyl)methylcarbamoyl]-8-hydroxy-1,6-naphthyridin-5-yl]-1,4-dioxo-1,2,5-thiadiazepan-1-ylidene]oxidanium by IUPAC nomenclature, provide its molecular formula.
user
C22H23FN5O5S+
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