You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3R,7R,8R)-2-N,3-N,7-N,8-N-tetraphenyl-1,4,6,9-tetraoxa-5-boranuidaspiro[4.4]nonane-2,3,7,8-tetracarboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H28BN4O8-
assistant