4 5 4 5 6 7 July 8, 2019 16 32 64 128 4 5 4 5 7 6 divided by 4 4 5 6 7 8 4 5 5 6 7 9 4 3 4 5 6 7 4 5 diethyl 3 4 5 7 tetramethyl 6 propyldecan
