You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[(2S,4S)-2-cyclopropyloxan-4-yl]-3-[2-(2,3-dihydro-1H-inden-2-yl)ethyl]urea into its molecular formula.
user
C20H28N2O2
assistant