You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (3S)-3-amino-4-[[(2S)-6-amino-1-[[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]amino]-1-oxohexan-2-yl]amino]-4-oxobutanoic acid ?
user
C19H28N4O7
assistant