You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 6-bromo-3-chloropyrazin-2-amine;tert-butyl N-(5-methyl-2-oxo-1H-pyrazin-3-yl)carbamate;nona-1,3,5,7-tetrayne ?
user
C23H22BrClN6O3
assistant