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 (2S,4R)-6-chloro-4-hydroxy-N-[(3S)-3-hydroxy-4-[[2-[3-(trifluoromethoxy)cyclobutyl]oxyacetyl]amino]butyl]-3,4-dihydro-2H-chromene-2-carboxamide .
user
C21H26ClF3N2O7
assistant