You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 5,7-dichloro-4-[2-[[(10R)-5,10-dihydrothieno[2,3-c][2]benzothiepin-10-yl]oxy]ethylamino]quinoline-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H22Cl2N2O3S2
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