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 methyl 2-[[2-[[4-methyl-5-(2-methylphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetyl]amino]thiophene-3-carboxylate .
user
C18H18N4O3S2
assistant