1 3 5-tris(4-carboxyphenyl)benzene July 8, 2019 16 32 64 128 1 3 5-benzenetricarboxylic acid 1 3 5-tri(pyridin-4-yl)benzene 1 3 5-tris(4-aminophenyl)benzene 1 3 5-tris(4-carboxyphenyl)benzene mof