You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-N-[2-cyclobutyl-3-methyl-6-(4-pyridin-2-ylpiperazine-1-carbonyl)benzimidazol-4-yl]oxolane-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H32N6O3
assistant