1,1,2-Trimethylethylene 2-Butene, 2-methyl- 2-Methyl-2-butene 2-Methyl-2-butene [UN2460] [Flammable liquid] 2-Methylbut-2-ene 3-Methyl-2-butene 513-35-9 AI3-37711 AMYLENE Amylene (VAN) EINECS 208-156-3 Ethylene, trimethyl- HSDB 2072 NSC 74118 Trimethylethylene UN2460 beta-Isoamylene n-Amylene