You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[2-(diethylamino)-5-[ethyl(pyridine-4-carbonyl)amino]pyrimidin-4-yl]amino]-3-[4-[1-(2,2-dimethylpropyl)-2-oxoimidazo[4,5-b]pyridin-3-yl]phenyl]propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C36H43N9O4
assistant