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 1-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethyl]-7,7-bis(hydroxymethyl)-N-methyl-1-(2-methylphenyl)-6-oxo-3,4,8,8a-tetrahydropyrrolo[1,2-a]pyrazine-2-carboxamide .
user
C28H31F6N3O4
assistant