- Tetramethyl 9′-ethoxy-5’,5′-dimethyl-5’,6′-dihydrospiro[1,3-dithiole-2,1′-thiopyrano[2,3-c]quinoline]-2’,3’,4,5-tetracarboxylate,95%, 1g
- Tetramethyl 9′-ethoxy-5’,5′-dimethyl-5’,6′-dihydrospiro[1,3-dithiole-2,1′-thiopyrano[2,3-c]quinoline]-2’,3’,4,5-tetracarboxylate,95%, 500mg