2-(1,3-dithian-2-ylidene)-3-oxobutanoic acid

2-(1,3-dithian-2-ylidene)malonic acid

1-(1,3-dithian-2-ylidene)propan-2-one

5-(1,3-二氧戊环-2-基)苯并-1,3-二氧杂环戊烯

2,4-dichloro-3-(1,3-propylenedithio-methylene)-penta-1,4-diene