You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-chloro-2-[4-[[1-(2-hydroxyethyl)-2,5-dioxopyrrol-3-yl]amino]phenyl]quinoline-4-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H16ClN3O5
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