1 3 dimethyl pent 2 ene is called July 8, 2019 16 32 64 128 2 3-dimethylpent-1-ene 2 3-dimethyl-1-pentene 2 3-dimethyl pent-2-ene 2 3 dimetylpent-1-en 2 3-dimethyl-1-pentanol