:confused::confused::confused:[quote]Chất có tên là gì ? [LIST] 1-butyl-3-metyl-4-etylbezen 1-butyl-4-etyl-3-metylbezen 1-etyl-2-metyl-4-butylbezen 4-butyl-1-etyl-2-metylbezen giúp mình vói nha.....^^