6 1 8 3 5 8 July 8, 2019 16 32 64 128 6 1 8 w 3 5 8 6 7 dimethyl 1 2 3 5 8 8a hexahydronaphthalene 3 8x 1 5 8x 8 6 6 1 8 minus 3 5 8 5 6 4x 8 )= 3 8x 1 4
