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 4-ethyl-7-[(Z)-4-methoxy-3-methyl-2-(2-methylpropylideneamino)but-2-enyl]pyrrolo[2,3-d]pyrimidin-2-amine;2-methylbutane .
user
C23H39N5O
assistant