You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(2R)-2-cyclopentyloxy-2-pyridin-4-ylethyl]-2-methyl-8-(trifluoromethyl)-3,4-dihydro-1H-pyrido[4,3-b]indole is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H28F3N3O
assistant