You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-[2-(9,14,21-triazapentacyclo[12.7.0.02,7.08,13.015,20]henicosa-1(21),2,4,6,8(13),9,11,15,17,19-decaen-10-yl)propan-2-yl]pyridine-2-carboxylic acid into its molecular formula.
user
C27H20N4O2
assistant