(2',7'-Dibromo-3',6'-dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthen)-4'-yl)hydroxymercury 55728-51-3 EINECS 259-779-2 Mercury, (2',7'-dibromo-3',6'-dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthen)-4'-yl)hydroxy-