316357-99-0

tetramethyl 6-[(2,5-dioxo-1-pyrrolidinyl)acetyl]-5,5,8-trimethyl-5,6-dihydrospiro(1H-thiopyrano[2,3-c]quinoline-1,2'-[1,3]-dithiole)-2,3,4',5'-tetracarboxylate tetramethyl 6'-[(2,5-dioxopyrrolidin-1-yl)acetyl]-5',5',8'-trimethyl-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'-[(2,5-dioxo-1-pyrrolidinyl)acetyl]-5',6'-dihydro-5',5',8'-trimethyl-, tetramethyl ester (9CI)