You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [3-hydroxy-1-oxo-1-[4-(pyridin-3-ylmethyl)piperidin-1-yl]propan-2-yl]urea by IUPAC nomenclature, provide its molecular formula.
user
C15H22N4O3
assistant