1(3H)-Isobenzofuranone, 3,3-bis[4-hydroxy-2-methyl-5-(1-methylethyl)phenyl]- 125-20-2 NSC2186 Phenolphthalein, 5',5''-diisopropyl-2',2''-dimethyl- Thymolphthalein Thymophthalein