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-[2-(4,5-dihydro-1,3-oxazol-2-yl)propan-2-yl]-4-methyl-4,5-dihydro-1,3-oxazole;2,2-dimethylpropane;2-methylbutane .
user
C20H40N2O2
assistant