330440-04-5

tetramethyl 6'-butanoyl-5',5',9'-trimethyl-5',6'-dihydrospiro[1,3-dithiole-2,1'-thiopyrano[2,3-c]quinoline]-2',3',4,5-tetracarboxylate tetramethyl 6'-butyryl-5',5',9'-trimethyl-5',6'-dihydrospiro[1,3-dithiole-2,1'-(1'H)-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, 5',6'-dihydro-5',5',9'-trimethyl-6'-(1-oxobutyl)-, tetramethyl ester (9CI)