You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (R)-(2,3-dimethoxyphenyl)-[2,2,3,3,4,5,5,6,6-nonadeuterio-1-[1,1-dideuterio-2-(4-fluorophenyl)ethyl]piperidin-4-yl]methanol by IUPAC nomenclature, provide its molecular formula.
user
C22H28FNO3
assistant