309270-70-0

tetramethyl 6-acetyl-5,5,7,9-tetramethyl-5,6-dihydro-spiro(1H-thiopyrano[2,3-c]quinoline-1,2'-[1,3]-dithiole)-2,3,4',5'-tetracarboxylate tetramethyl 6'-acetyl-5',5',7',9'-tetramethyl-5',6'-dihydrospiro[1,3-dithiole-2,1'-thiopyrano[2,3-c]quinoline]-2',3',4,5-tetracarboxylate Spiro[1,3-dithiole-2,1'-[1H]thiopyrano[2,3-c]quinoline]-2',3',4,5-tetracarboxylic acid, 6'-acetyl-5',6'-dihydro-5',5',7',9'-tetramethyl-, tetramethyl ester (9CI)