2-Ethyl-2,5-dihydro-4,5-dimethylthiazole76788-46-0100 % similar 2,5-Dihydro-4,5-dimethyl-2-(2-methylpropyl)thiazole65894-83-963 % similar 2,5-Dihydro-4,5-dimethyl-2-(1-methylpropyl)thiazole65894-82-859 % similar