You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[[2-[[2-amino-5-(diaminomethylideneamino)pentanoyl]amino]acetyl]amino]-4-[[1-carboxy-2-(1H-indol-3-yl)ethyl]amino]-4-oxobutanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H32N8O7
assistant