((3.8-Dimethoxyindelo(2 3-ajcarbazole-11,12-diy)bis(propane-3.1-dbyl))diphosphonic acid

((3.8-Dimethoxyindelo(2 3-ajcarbazole-11,12-diy)bis(propane-3.1-dbyl))diphosphonic acid · CAS 3038707-54-6