1,1,1-Trichloro-2-methyl-2-propanol hemihydrate6001-64-5100 % similar Chlorobutanol57-15-882 % similar Pinacol hexahydrate6091-58-361 % similar Pinacol76-09-544 % similar 1,1,1-Trifluoro-2-methylpropan-2-ol507-52-835 % similar