You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(3-chloro-2-methylphenyl)-2-[(6S)-2-ethyl-5-oxo-4,6-dihydroimidazo[1,2-b][1,2,4]triazol-6-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C15H16ClN5O2
assistant