You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 7-hydroxy-2-[[2-methyl-6-(4-nitrophenyl)sulfonyl-5,7-dihydro-4H-thieno[2,3-c]pyridin-3-yl]methylcarbamoylamino]-5,7-dihydro-4H-thieno[2,3-c]pyran-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H32N4O9S3
assistant