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 1,4-dimethyl-4-(3-methylbut-1-en-2-yl)piperidine;1-methyl-4-(3-methylbut-1-en-2-yl)piperidine-4-carbonitrile .
user
C24H43N3
assistant