You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-1,2-dimethyl-3-(2-methylphenyl)-2H-imidazole;ethane;2-methyl-1-(2-methylphenyl)isoquinolin-2-ium;2-methyl-3-(2-methylphenyl)isoquinolin-2-ium;1-methyl-2-(2-methylphenyl)quinolin-1-ium;7-methyl-6-(1-methylpyridin-1-ium-2-yl)-[1]benzofuro[3,2-b]pyridine by IUPAC nomenclature, provide its molecular formula.
user
C101H139N7O+4
assistant