You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 6-[(Z)-1-amino-3-[(1-methyl-2H-pyridin-4-yl)imino]prop-1-en-2-yl]-1,3,3-trimethylindol-2-one ?
user
C20H24N4O
assistant