Chloral hydrate302-17-0100 % similar 2-Chloro-2,2-difluoro-1,1-ethanediol63034-47-942 % similar Pentachloroethane76-01-735 % similar 2,2,2-Trifluoro-1,1-ethanediol421-53-433 % similar 2,2,2-Trichloro-1-phenylethanol2000-43-332 % similar