You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-chloro-9-methoxy-3a-methyl-2,3,5,9b-tetrahydro-1H-isochromeno[3,4-c]pyrrole;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H17Cl2NO2
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