110576-19-7 2-(5H-Indeno(1,2-b)pyridin-5-ylidene)hydrazinecarboxamide 4-21-00-04171 (Beilstein Handbook Reference) 4-Azafluoren-9-one semicarbazone BRN 0211420 Hydrazinecarboxamide, 2-(5H-indeno(1,2-b)pyridin-5-ylidene)-