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 (E)-4-(dimethylamino)-1-[4-[8-(3-phenoxyprop-1-ynyl)-7H-purin-6-yl]piperazin-1-yl]but-2-en-1-one;(E)-1-[4-[8-(3-phenoxyprop-1-ynyl)-7H-purin-6-yl]piperazin-1-yl]-4-piperidin-1-ylbut-2-en-1-one .
user
C51H58N14O4
assistant