You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 1-[4-[[1-(1-ethylpyrazole-4-carbonyl)-3-hydroxypyrrolidin-3-yl]methyl]piperazin-1-yl]ethanone ?
user
C17H27N5O3
assistant