You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-[6-(methylamino)purin-9-yl]phenyl]-3-[3-(2-pyrrolidin-1-ylethyl)-5-(trifluoromethyl)phenyl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H27F3N8O
assistant