You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(13,15-dioxa-4,7,8-triazatetracyclo[8.7.0.03,7.012,16]heptadeca-3,5,8-trien-9-yl)cyclohexan-1-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H26N4O2
assistant