You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [6-[3-(16-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1(17),2,4,6,9,11,13,15-octaen-15-yl)propyl]-1-methylidenepyridin-1-ium-2-ylidene]-methoxymethanolate .
user
C27H24N2O2
assistant