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-[(3R)-3-(2-hydroxy-3-methoxyphenyl)-5-thiophen-2-yl-3,4-dihydropyrazol-2-yl]-2-pyrrolidin-1-ylethanone .
user
C20H23N3O3S
assistant