You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-amino-N-[4-[(2R,4R,5R,6R)-5-ethyl-4-hydroxy-6-methyloxan-2-yl]pyridin-3-yl]-6-(1,3-thiazol-2-yl)pyridine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H25N5O3S
assistant