4 5 9 6 2 9 July 8, 2019 16 32 64 128 4 5 x 9 4 2 x 6 9 2 4 5 6 tetra 9h carbazol 9 yl isophthalonitrile 4 ethyl 5 6 7 9 tetramethyldeca 2 9 diene 2 4 5 6 tetrakis 9h carbazol 9 yl isophthalonitrile 9a 6 3a 5 4a 4 3a 2 9 4 9 1 6 5 phần 9 2
