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 2-[[5-(4-methylanilino)-1,3,4-thiadiazol-2-yl]sulfanyl]-N-[4-(3-nitrophenyl)-1,3-thiazol-2-yl]propanamide .
user
C21H18N6O3S3
assistant