2-[2-[4-(2-Azidotetrahydro-3-methyl-5-oxo-2-furanyl)phenyl]hydrazinylidene]propanedinitrile (Mixture of Diasteromers);2-[2-[4-(2-Azidotetrahydro-3-methyl-5-oxo-2-furanyl)phenyl]hydrazinylidene]propanedinitrile (Mixture;2-[2-[4-(2-Azidotetrahydro-3-MethylOpen