You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 7-chloro-4-(1-methyl-2-propan-2-yl-6,7-dihydro-4H-imidazo[4,5-c]pyridin-5-yl)quinoline into its molecular formula.
user
C19H21ClN4
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