PHENOLTETRACHLOROPHTHALEIN

4,5,6,7-tetrachlorophenolphthalein

4,5,6,7-tetrachloro-3,3-bis(4-hydroxyphenyl)phthalide

4,5,6,7-Tetrachloro-3,3-bis(4-hydroxyphenyl)isobenzofuran-1(3H)-one

3,3-Bis(4-hydroxyphenyl)-4,5,6,7-tetrachloroisobenzofuran-1(3H)-one