2-Amino-3-cyano-4,5-dimethylpyrrole21392-51-8100 % similar 2-Amino-4,5-dimethylfuran-3-carbonitrile5117-88-439 % similar 2,3,4,5-Tetramethylpyrrole1003-90-337 % similar 2,5-Diamino-3,4-dicyanothiophene17989-89-831 % similar 4-Amino-5-cyanoimidazole5098-11-331 % similar 2,3-Dimethylindole91-55-431 % similar