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 tert-butyl 4-[2-[methyl-[[(2S)-2-methyl-6-nitro-3H-imidazo[2,1-b][1,3]oxazol-2-yl]methyl]amino]ethyl]piperazine-1-carboxylate .
user
C19H32N6O5
assistant