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 ethyl (3R)-1-(4-methylthiadiazole-5-carbonyl)-3-[(E)-3-phenylprop-2-enyl]piperidine-3-carboxylate using the IUPAC nomenclature.
user
C21H25N3O3S
assistant