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 identified by N-(4-bromo-3-methyl-1,2-oxazol-5-yl)-2-[(E)-3-(4-methylphenyl)prop-2-enyl]thiophene-3-sulfonamide ?
user
C18H17BrN2O3S2
assistant