You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[2-[[2-(2-aminopropanoylamino)-3-methylbutanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-4-methylsulfanylbutanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H37N7O5S
assistant