You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(3,5-dimethyl-1H-pyrazol-4-yl)-1-[(5S,9S)-9-hydroxy-1-oxa-7-azaspiro[4.4]nonan-7-yl]ethanone by IUPAC nomenclature, provide its molecular formula.
user
C14H21N3O3
assistant