You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 8-propan-2-yl-3-(2,3,3-trimethylbutyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine .
user
C15H28N4
assistant