You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3R)-3-[[2-(4-phenoxyanilino)-7H-pyrrolo[2,3-d]pyrimidin-4-yl]amino]piperidin-1-yl]prop-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H26N6O2
assistant