NSC240386 Spiro(imidazolidine-4,1'-(1H)indene)-2,5-dione, 6'-[bis(2-chloroethyl)amino]-2',3'-dihydro- Spiro[imidazolidine-4,1'-[1H]indene]-2,5-dione, 6'-[bis(2-chloroethyl)amino]-2',3'-dihydro-