You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
8-cyclopentyl-N-(5-piperazin-1-ylpyridin-2-yl)-4,6,8,11-tetrazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaen-5-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26N8
assistant