3 4 9 2 1 July 8, 2019 16 32 64 128 3 4 9 2 1 6 3 4 9 2 1 8 3 4 2 9 16 4 3 9 2 11 3 4 2 9 10 3 4 9 7 1 2 3 4 5 9 1 2 3 4 x 9 1 2 3 4 9 5 x 3 2 1 2 3 4 9 tetrahydro 1h carbazole 6 3 4 x 9 1 2 3 4 9 divided by 2 1 3 3 8 4 9 x 1 2 4 3 4 x 9 1 2 x 7 4 9 2 0 1 3