1-Azafluoren-9-one thiosemicarbazone 2-(9H-Indeno(2,1-b)pyridin-9-ylidene)hydrazinethiocarboxamide 94721-59-2 BRN 5547594 Hydrazinecarbothioamide, 2-(9H-indeno(2,1-b)pyridin-9-ylidene)- Hydrazinethiocarboxamide, 2-(9H-indeno(2,1-b)pyridin-9-ylidene)-