107803-27-0 2(3H)-Furanone, dihydro-3-((3,4-dihydroxy-5-(((4-nitrophenyl)thio)methyl)phenyl)methylene)- Dihydro-3-((3,4-dihydroxy-5-(((4-nitrophenyl)thio)methyl)phenyl)methylene)-2(3H)-furanone