You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
18-methyl-25-azahexacyclo[12.11.0.02,7.08,13.015,24.016,21]pentacosa-1(14),2,4,6,8,10,12,15(24),16(21),19,22-undecaene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H19N
assistant