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 2-bromo-5-(4-propan-2-ylpiperazin-1-yl)pyrazine;tert-butyl 4-[6-[5-(4-propan-2-ylpiperazin-1-yl)pyrazin-2-yl]pyrrolo[1,2-b]pyridazin-4-yl]piperazine-1-carboxylate;tert-butyl 4-[6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrrolo[1,2-b]pyridazin-4-yl]piperazine-1-carboxylate;methane .
user
C61H92BBrN16O6
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