J Bladin 1885 tetrazole; modern modern foundational + carboxylic-acid bioisostere + click-CuAAC + tetrazole-azide-amine ortho-substitution.
J Bladin 1885 tetrazole; modern modern foundational + carboxylic-acid bioisostere + click-CuAAC + tetrazole-azide-amine ortho-substitution.