N,N′-Bis(1,1-dimethylethyl)thiourea4041-95-6100 % similar N-(tert-Butyl)thiourea7204-48-039 % similar Diafenthiuron80060-09-931 % similar 2-tert-Butyl-1,1,3,3-tetramethylguanidine29166-72-131 % similar tert-Butylurea1118-12-330 % similar