You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-(4-methyl-3-morpholin-4-ylsulfonylanilino)-1-oxopropan-2-yl] 2-(3,5-dimethyl-1,2-oxazol-4-yl)acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H27N3O7S
assistant