You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[[2-[2-(3,5-dimethyl-4-nitropyrazol-1-yl)acetyl]oxyacetyl]amino]-5-ethyl-4-methylthiophene-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H24N4O7S
assistant