You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[(5-methyl-1,2-oxazol-3-yl)amino]-1-oxobutan-2-yl] (E)-3-[2,5-dimethyl-1-(1,3-thiazol-2-yl)pyrrol-3-yl]prop-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H22N4O4S
assistant