You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 4-(4-tert-butylphenoxy)-N-[4-[(4-methyl-5-sulfanylidene-1H-1,2,4-triazol-3-yl)methyl]-1,3-thiazol-2-yl]butanamide ?
user
C21H27N5O2S2
assistant