You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,N-dimethyl-1-(3-methyl-6-nitro-1,3,4,9-tetrahydropyrano[3,4-b]indol-1-yl)-3-phenylpentan-3-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H31N3O3
assistant