You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-[(4R)-3,4-dihydro-2H-chromen-4-yl]-3-[(1S)-1-[(2R)-oxolan-2-yl]ethyl]urea is given. What is its corresponding molecular formula?
user
C16H22N2O3
assistant