... .7(water solution of 0.01M) ,soluble in NMF,DMSO,acetonitrile,sapringly soluble in acloholic,water,ether,acetone,halogenated hydrocarbon ... and benzene.It present yellow or brown because of a small amount ... 178-181Usage:Widely used as the initial materials for the synthesis of various heterocyclic compound, such as cancer-treating drug, ...