- Tetramethyl 5’,5’,8’,9′-tetramethyl-5’,6′-dihydrospiro[1,3-dithiole-2,1′-thiopyrano[2,3-c]quinoline]-2’,3’,4,5-tetracarboxylate,95%, 5g
- Tetramethyl 5’,5’,8’,9′-tetramethyl-5’,6′-dihydrospiro[1,3-dithiole-2,1′-thiopyrano[2,3-c]quinoline]-2’,3’,4,5-tetracarboxylate,95%, 1g