You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl 2-amino-4-(3,4-dichlorophenyl)-6,7-dimethyl-5-oxo-4H-pyrano[3,2-c]pyridine-3-carboxylate .
user
C18H16Cl2N2O4
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