You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(1,3-benzoxazol-2-yl)-3-(4-methylphenyl)-1-(4-propan-2-yloxyphenyl)prop-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H23NO3
assistant