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 3,16,20,27,28,33-hexazaheptacyclo[21.5.2.12,5.110,14.118,22.04,9.026,29]tritriaconta-1(28),2,4(9),5,7,10,12,14(32),18(31),19,21,23(30),24,26(29)-tetradecaene .
user
C27H20N6
assistant