6 ethyl 3 4 4 trimethyloctane July 8, 2019 16 32 64 128 6 ethyl 3 4 5 trimethyloctane 3 methylhexane 4 4 6-trimethyloctane 2 3 3-trimethyl-1 4 6-octatriene 3 5 6-trimethyloctane 3-methyl-4-(2 6 6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one