You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-[21-(9-oxo-8a,10a-dihydroxanthen-3-yl)-9,24-diazanonacyclo[15.13.1.12,9.03,8.010,15.018,23.024,31.025,30.016,32]dotriaconta-1,3(8),4,6,10,12,14,16(32),17(31),18(23),19,21,25,27,29-pentadecaen-6-yl]xanthen-9-one .
user
C56H30N2O4
assistant