You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-(6-chloro-2,4,8,22-tetrazatetracyclo[14.3.1.13,7.19,13]docosa-1(19),3,5,7(22),9(21),10,12,16(20),17-nonaen-12-yl)propanamide ?
user
C21H20ClN5O
assistant