You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-tert-butyl-1,2-oxazol-5-yl)-2-[methyl-[2-(3-methylphenoxy)ethyl]amino]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H27N3O3
assistant