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 2,5-dichloro-N-[2-[[(1R)-1-[(4R,6S)-4,6-dimethyl-3-oxo-2,8-dioxa-5-aza-1-boranuidabicyclo[3.3.0]octan-1-yl]-3-methylbutyl]amino]-2-oxoethyl]benzamide .
user
C20H27BCl2N3O5-
assistant