You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-chloro-N-[(3R,5S)-3-hydroxy-2,5-dimethylhept-1-en-4-yl]thiophene-2-sulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H20ClNO3S2
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