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 6-ethyl-N-[(2-fluorophenyl)methyl]-2-propan-2-ylimidazo[2,1-b][1,3,4]thiadiazole-5-sulfonamide ?
user
C16H19FN4O2S2
assistant