7 c 2 5 July 8, 2019 16 32 64 128 4 7 dibromobenzo c 1 2 5 thiadiazole 3 5c 7 )+ 2 c 3 C 2 5c 7 4 7 c 10 5c 2 A b 7 4 b c 2 5 1 c+ 2 1 7 5 C = 2 3 5 7 C 5 2 d 7 3 7 c 2 2 5 c
