4-methyl-N'-(2,2,5,5-tetramethyl-4-oxodihydrothiophen-3(2H)-ylidene)benzenesulfonohydrazide

三甲基膦酰基乙酸酯

3-diazo-2,2,5,5-tetramethylthiolan-4-one

4,4-dimethyl-2-(2-propylidene)-3-thietanone