You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 9-(7H-cyclopenta[b]pyridin-3-yl)-1-[1-[(2R)-2-hydroxypropanoyl]piperidin-4-yl]-3-methyl-4H-pyrimido[5,4-c][1,5]naphthyridin-2-one is given. What is its corresponding molecular formula?
user
C27H28N6O3
assistant