2,2-Dimethylpropanethioamide630-22-8100 % similar 2,2-Dimethylpropanethioic acid55561-02-936 % similar Pivalamide754-10-936 % similar 2,2-Dimethylpropionamidine hydrochloride18202-73-832 % similar N-(1,1-Dimethylethyl)thiourea7204-48-032 % similar