You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-[6-(azetidin-1-yl)-2-cyclopropylpyrimidin-4-yl]-3-[1-(5-methyl-1,3-thiazol-2-yl)ethoxy]pyridin-2-amine by IUPAC nomenclature, provide its molecular formula.
user
C21H24N6OS
assistant