Also Called: Tetrakis(acetato-O)[.mu.4-(3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-2',4',5',7'-tetrayl)]tetramercury;Tetrakis(acetato-O)[μ4-(3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-2',4',5',7'-tetrayl)]tetramercury;[2-[3',6'-Dihydroxy-2',5',7'-tris(2-mercuriooxy-2-oxoethyl)-3-oxospiro[2-benzofuran-1,9'-4a,8a,9a,10a-tetrahydroxanthene]-4'-yl]acetyl]oxymercury