You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-[(R)-ethylsulfinyl]pyridin-2-yl]-3-methyl-6-(trifluoromethylsulfanyl)imidazo[4,5-b]pyridine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H13F3N4OS2
assistant