You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 9-[4-(1-aminoethyl)phenyl]-8-hydroxy-6-methyl-5H-thieno[2,3-c]quinolin-4-one;hydrochloride into its molecular formula.
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C20H19ClN2O2S
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