You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[1-[(5-ethyl-1,3,4-thiadiazol-2-yl)amino]-3-methyl-1-oxobutan-2-yl]-3-morpholin-4-ylsulfonylbenzamide .
user
C20H27N5O5S2
assistant