You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[5-(2-methylpropyl)-4-phenyl-1,3-oxazol-2-yl]methyl]-2-(4-phenylpiperazin-1-yl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H32N4O2
assistant