You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[[(5S)-6-amino-5-[[(2S)-4-methyl-2-(methylamino)pentanoyl]amino]-6-oxohexyl]carbamoyl]phenyl]methyliminoazanium;azanide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H37N7O3
assistant