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 N-[5-[(E)-2-[5-[(2,5-difluorophenyl)sulfamoyl]thiophen-2-yl]ethenyl]-3-methyl-1,2-oxazol-4-yl]propanamide .
user
C19H17F2N3O4S2
assistant