You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [6-hydroxy-3-[(3-methylphenyl)methyl]-2H-indazol-5-yl]-[(3S)-3-hydroxypyrrolidin-1-yl]methanone into its molecular formula.
user
C20H21N3O3
assistant