1 3 6 8 tetrakis 4 formylphenyl pyrene July 8, 2019 16 32 64 128 1 3 6 8-tetrakis(p-benzoic acid)pyrene 4 4' 4'' 4'''-(pyrene-1 3 6 8-tetrayl)tetrabenzoic acid 3 4 5 6-tetrahydro-2-pyrimidinethiol 1 3 6 8-tetrakis(p-formylphenyl)pyrene