You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2,7-dimethyl-8-[1-methyl-5-[3-(2,3,3,3-tetradeuterio-2-methylpropyl)phenyl]pyridin-1-ium-2-yl]-[1]benzofuro[2,3-b]pyridine by IUPAC nomenclature, provide its molecular formula.
user
C29H29N2O+
assistant