You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S)-1-(4-fluorophenyl)-6-methoxy-N-(2-methoxyphenyl)-1,3,4,9-tetrahydropyrido[3,4-b]indole-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H24FN3O3
assistant