You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(2S)-5-(4-ethoxyphenyl)-1-[(2R)-2-methyl-4-pyrimidin-2-ylpiperazin-1-yl]-1-oxopentan-2-yl]-2,2-dimethyl-1,3-dioxolan-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H36N4O5
assistant