You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 5-[(3,4-dichlorophenyl)-[(2-methylphenyl)methoxy]methyl]-3-ethyl-4H-1,2-oxazole-5-carboxylic acid using the IUPAC nomenclature.
user
C21H21Cl2NO4
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