You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (1R,2R,4R,6R,9S,11R)-2,4,6,12,12-pentamethyl-3-oxa-8-azatetracyclo[9.1.1.02,9.04,8]tridecan-7-one using the IUPAC nomenclature.
user
C16H25NO2
assistant