You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 3-[[2-[tert-butyl-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-sulfanylpropanoyl]amino]-2-(3,4-dimethylphenyl)acetyl]amino]propanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H43N3O6S
assistant