You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2-ethyl-5-methylpyrazol-3-yl)amino]-1-[(E)-4-[2-[(2-ethyl-5-methylpyrazol-3-yl)amino]benzimidazol-1-yl]but-2-enyl]benzimidazole-5-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H34N10O2
assistant