2'-tert-Butyl-4'-methyl-6'-diethylaminospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one

2'-tert-Butyl-4'-methyl-6'-diethylaminospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one is a complex chemical compound with a highly fused and intricate structure. It consists of a spirocyclic isobenzofuran ring system fused to a xanthene ring, which includes a ketone group (C=O) at the 3-position.