You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(5-tert-butyl-1,2-oxazol-3-yl)-2-methyl-2-[methyl(propan-2-yl)amino]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H27N3O2
assistant