You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (5-ethynylthiophen-2-yl) N-[(3R)-1-[3-methyl-4-(3-oxomorpholin-4-yl)phenyl]-5-oxopyrrolidin-3-yl]carbamate into its molecular formula.
user
C22H21N3O5S
assistant