You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 3-[1-(4-acetyl-3,5-dimethyl-1H-pyrrole-2-carbonyl)piperidin-4-yl]-4,4-dimethyl-1,3-oxazolidin-2-one ?
user
C19H27N3O4
assistant