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 (6-butyl-2-methyl-4H-imidazo[1,5-b]pyrazol-3-yl)-(4-methyl-1,2-thiazol-5-yl)diazene .
user
C14H18N6S
assistant