Einecs 230-197-0

1,2-dihydro-3,4,5,6-tetraphenylphthalic anhydride

4,5,6,7-Tetraphenyl-3a,7a-dihydroisobenzofuran-1,3-dione

3a,7a-Dihydro-4,5,6,7-tetraphenyl-1,3-isobenzofurandione