You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S,3R,4S,5S)-1-methyl-3-[(1S)-2-methyl-1-phenylmethoxypropyl]-4-nitro-5-pyridin-3-ylpyrrolidine-2-carboxylic acid ?
user
C22H27N3O5
assistant