2-溴代异丁酸甲酯

thiourea

2-氨基-5,5-二甲基-1,3-噻唑-4-酮

methyl 2-methyl-2-thiocyanatopropanoate

(5,5-dimethyl-4-oxo-4,5-dihydro-thiazol-2-yl)-urea