You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2R)-butan-2-yl]-N'-[(Z)-(3,5-dichloro-4-methoxyphenyl)methylideneamino]oxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H17Cl2N3O3
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