You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 6-chloro-5-ethyl-3-(5,6,7,8-tetrahydronaphthalen-1-yl)-1H-pyrimidine-2,4-dione by IUPAC nomenclature, provide its molecular formula.
user
C16H17ClN2O2
assistant