You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-(1,2-benzoxazol-5-yl)-1-tert-butylpyrazol-4-yl]-3-[4-[2-(methanesulfonamido)pyridin-4-yl]oxyphenyl]urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H27N7O5S
assistant