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 2-[4-[4-[(2R,4S)-4-ethyl-2,3-difluorocyclohexyl]cyclohexyl]-2,3-difluorocyclohexyl]-5-methyl-1,3-diazinane .
user
C25H42F4N2
assistant