You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[(1R)-2-(cyclopentylamino)-1-(4-methylphenyl)-2-oxoethyl]-N-(2-methoxyethyl)thiadiazole-4-carboxamide .
user
C20H26N4O3S
assistant