You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2S)-butan-2-yl]-N-[(4,6-dimethyl-2-oxo-1H-pyridin-3-yl)methyl]-6-[6-[4-[6-[2-(2,6-dioxopiperidin-3-yl)-1,3-dioxoisoindol-4-yl]oxyhexyl]piperazin-1-yl]pyridin-3-yl]-3-methylindole-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C50H58N8O7
assistant