You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by tert-butyl (2S)-3-[(2R)-2-ethyl-3,5-dioxopyrrolidin-2-yl]-2-methylpropanoate;tert-butyl (2R)-3-[(2S)-2-ethyl-3,5-dioxopyrrolidin-2-yl]-2-methylpropanoate;(2S)-3-[(2R)-2-ethyl-3,5-dioxopyrrolidin-2-yl]-2-methylpropanoic acid;(2R)-3-[(2S)-2-ethyl-3,5-dioxopyrrolidin-2-yl]-2-methylpropanoic acid ?
user
C48H76N4O16
assistant