4 7 9 1 5 9 July 8, 2019 16 32 64 128 1 4 7 cycloundecatriene 1 5 9 9 tetramethyl z z z 1 4 7 cycloundecatriene 1 5 9 9 tetramethyl 5 4 9 1 7 9 as a fraction
