You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(E)-2-[6-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]-4-(oxan-4-yloxy)pyrazolo[1,5-a]pyridin-3-yl]but-1-en-3-ynyl]hydrazine .
user
C26H37N7O2
assistant