You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance ethyl (3R,6E,7aR)-3-tert-butyl-6-[1-(4-cyclohexylpiperazin-1-yl)ethylidene]-5,7-dioxo-1,3-dihydropyrrolo[1,2-c][1,3]oxazole-7a-carboxylate .
user
C25H39N3O5
assistant