N,N-二甲基硫脲

1-溴-3-甲基-2-丁酮

ethyl 2-bromo-4-methyl-3-oxopentanoate

2-(1-ethoxycarbonyl-3-methyl-2-oxobutylthio)-Δ2-thiazolinium bromide

2-carboxy-3-(1-methylethyl)-5,6-dihydrothiazolo(2,3-b)thiazolium bromide