2,7-Diaminofluoren hydrochlorid [Czech] 2,7-Diaminofluorene hydrochloride 2,7-Fluorenediamine hydrochloride 5178-56-3 525-64-4 9H-Fluorene-2,7-diamine monohydrochloride EINECS 225-959-4 FLUORENE-2,7-DIAMINE, HYDROCHLORIDE