Synonyms: Spiro[2H-1-benzopyran-2,2'-indolin]-6-ol,1',3',3'-trimethyl- (8CI); 1,3,3-Trimethyl-6'-hydroxyspiro[indoline-2,2'-benzopyran];1',3',3'-Trimethyl-6-hydroxyspiro[2H-1-benzopyran-2,2'-indoline];1',3',3'-Trimethyl-6'-hydroxy-spiro-[2H-1-benzopyran-2,2'-indoline];6-Hydroxy-1',3',3'-trimethylspiro[2H-1-benzopyran-2,2'-indoline]; NSC 270086