You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1R)-2-(2-amino-2-oxoethyl)-1'-(2-phenoxyethyl)spiro[4,9-dihydro-3H-pyrido[3,4-b]indole-1,3'-pyrrolidine]-6-yl] trifluoromethanesulfonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27F3N4O5S
assistant