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 N-[4-(3,4-dimethoxyphenyl)-1,3-thiazol-2-yl]-2-phenyl-1,3-thiazole-5-carboxamide using the IUPAC nomenclature.
user
C21H17N3O3S2
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