81827-18-1 N'-(beta-D-Galactopyranosyl)-N-(2-methyl-4-oxo-2-pentyl)thiourea N-(1,1-Dimethyl-3-oxobutyl)-N'-beta-D-galactopyranosylthiourea Thiourea, N-(1,1-dimethyl-3-oxobutyl)-N'-beta-D-galactopyranosyl-