You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3aS,6R,7aS)-3a-(3,4-dimethoxyphenyl)-1-methyl-3,4,5,6,7,7a-hexahydro-2H-indol-6-yl]-3-[2,3-difluoro-4-(trifluoromethyl)phenyl]urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H28F5N3O3
assistant