You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as spiro[2,3-dihydro-1H-anthracene-4,2'-pentacyclo[7.3.1.11,10.03,8.05,13]tetradeca-3(8),4,6,9(13)-tetraene] using the IUPAC nomenclature.
user
C27H22
assistant