2 7 dibromo 9 9 dioctyl 9h fluorene July 8, 2019 16 32 64 128 9 9-dioctyl-2 7-dibromofluorene 2 7 dibromo fluorene 2 7-dibromo-9 9-dioctylfluorene 2 7-dibromo-9h-fluoren-9-one
