You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [4-(4-hydroxyphenyl)piperazin-1-yl]-[(3S)-1-(2-methoxyethyl)piperidin-3-yl]methanone by IUPAC nomenclature, provide its molecular formula.
user
C19H29N3O3
assistant