You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2E)-N-[4-(pyrimidin-2-ylsulfamoyl)anilino]-1H-benzimidazole-2-carboximidoyl cyanide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H14N8O2S
assistant