You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-1-[4-(methanesulfonamido)phenyl]-1-oxopropan-2-yl] (1S)-2,2-dichloro-1-methylcyclopropane-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H17Cl2NO5S
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