You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
pentyl N-[4-[2-(2-chloroacetyl)-6,8-difluoro-1,3,4,9-tetrahydropyrido[3,4-b]indol-1-yl]phenyl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H26ClF2N3O3
assistant