You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-methyl-N-[(1S)-1-(1-methylpyrazol-4-yl)ethyl]-6-(2-phenylethyl)pyrazolo[3,4-d]pyrimidin-4-amine .
user
C20H23N7
assistant