5,5'6,6'-Tetrahydroxy-3,3,3',3'-tetramethyl-1,1'-spirobisindane;3,3,3,3-tetrame.-1,1-spirobiindane-5,5,6,6-tetraol;3,3,3,3-tetramethyl-1,1-spirobisindane-5,5,6,;3,3,3,3-Tetramethyl-1,1-spirobiindane-5,5,6,6-tetraol;3,3,3_,3_-Tetramethyl-1,1_-spirobisindane-5.5_,6,6_-tetrol;2-Chloro-4-Methylthiobutyric acid;5,5',6,6'-Tetrahydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane;3,3,3',3'-tetramethyl-5,6,5',6'-tetrahydroxy-1,1'-spiro-bis(indane);5,5',6,6'-TETRAHYDROXY-3,3,3',3'-TETRAMETHYL-1,1'-SPIROBISIN;5,5',6,6'-Tetrahydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindan;5,5',6,6'-Tetrahydroxy-3,3,3',3'-tetramethyl-1,1'-spirobisindane;1,1'-spirobi[1h-indene]-5,5',6,6'-tetrol, 2,2',3,3'-tetrahydro-3,3,3',3'-tetram;5,5'6,6'-tetrahydroxy-3,3,3',3'-tetramethyl- 1,1'-spirobisindane