You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[(2S)-5-ethoxy-2-methyl-2,3-dihydro-1-benzofuran-6-yl]-4-methyl-2-pyridin-2-yl-1,3-thiazole-5-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C21H21N3O3S
assistant