You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 2-N-(2-aminoethyl)-1-N-(2,4-difluorophenyl)-3-N-(3-fluorophenyl)-1,3-diazinane-1,2,3-tricarboxamide ?
user
C21H23F3N6O3
assistant