You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 5-[4-[2-(3-methoxypropylamino)-2-oxoethyl]piperidine-1-carbonyl]-N-phenyl-1,3,4-thiadiazole-2-carboxamide using the IUPAC nomenclature.
user
C21H27N5O4S
assistant