10 2 3 7 9 July 8, 2019 16 32 64 128 14 2 7 3 9 equals 10 2 4 x 3 10 x 7 9 2 3 6 7-tetramethoxy-9 10-dimethylanthracene 2 3 6 7 tetrahydroxy 9 10 anthraquinone 10 9 x 7 12 =- 2 3
