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 ethyl 2-[2-[[(2S)-2-(1,3-dioxoisoindol-2-yl)-3-methylbutanoyl]amino]-1,3-thiazol-4-yl]acetate ?
user
C20H21N3O5S
assistant