4-甲氧基苯甲醛二乙基缩醛

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

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

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

4-甲氧基苯基-1,3-二噻戊环