201747-21-9 4-Ethyl-1-((4,9-dimethoxy-5H-furo(3,2-g)(1)benzopyran-5-on-7-yl)methylene)thiosemicarbazone Hydrazinecarbothioamide, 2-((4,9-dimethoxy-5-oxo-5H-furo(3,2-g)(1)benzopyran-7-yl)methylene)-N-ethyl-