Synonyms: Angelicolide;90826-58-7;Dispiro(isobenzofuran-1(3H),1'-cyclobutane-2',1''(3''H)-isobenzofuran)-3,3''-dione, 6,6'',7,7''-tetrahydro-3',4'-dipropyl-;Dispiro[isobenzofuran-1(3H),1'-cyclobutane-2',1''(3''H)-isobenzofuran]-3,3''-dione, 6,6'',7,7''-tetrahydro-3',4'-dipropyl-;AC1LASPG;NSC 382182