2 7 10 9 4 July 8, 2019 16 32 64 128 2 5y 4 7 9 10 2 4 7 of 10 1 9 2 x 7 10 9 4 2 times 7 10 9 4 2 5 y 4 7 9 10 y 2 7-diamino pyrene-4 5 9 10-tetraone 10 9 7 4x 2 5 2 7 dibromopyrene 4 5 9 10 tetraone 2 corintios 4 7 8 9 10 2 4 7 x 10 1 9
