1-((4,9-Dimethoxy-5H-furo(3,2-g)(1)benzopyran-5-on-7-yl)methylene)thiosemicarbazone 2-((4,9-Dimethoxy-5-oxo-5H-furo(3,2-g)(1)benzopyran-7-yl)methylene)hydrazinecarbothioamide 975-21-3 Hydrazinecarbothioamide, 2-((4,9-dimethoxy-5-oxo-5H-furo(3,2-g)(1)benzopyran-7-yl)methylene)-