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Keywords: Benzo(pqr)tetraphene 200.svg validSVG Structure of benzopqrtetraphene Struktur von Benzopqrtetraphen Own 2014-03-04 Emeldir <span class signature-talk >talk</span> Chemical structure verified https //upload wikimedia org/wikipedia/commons/1/1d/Benzo 28pqr 29tetraphene_200 svg 1S/C20H12/c1-2-7-17-15 4-1 12-16-9-8-13-5-3-6-14-10-11-18 17 20 16 19 13 14/h1-12H FMMWHPNWAFZXNH-UHFFFAOYSA-N 50-32-8 200-028-5 PD-chem Benzo a pyrene |