You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (3aR)-2-(2-hydroxy-6-oxopiperidin-3-yl)-5-piperidin-4-yl-3a,4,5,6,7,7a-hexahydro-3H-isoindol-1-one ?
user
C18H29N3O3
assistant