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-(2,3-dichlorophenyl)-2-[(2S)-2-(morpholine-4-carbonyl)-2,3-dihydro-1,4-benzoxazin-4-yl]acetamide using the IUPAC nomenclature.
user
C21H21Cl2N3O4
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