3-phenyl-4-furoxancarboxylic acid

2-oxido-4-phenyl-1,2,5-oxadiazol-2-ium-3-carbaldehyde

5-oxido-4-phenyl-1,2,5-oxadiazol-5-ium-3-carbaldehyde

2-phenyl-2-hydroxyiminoacetonitrile oxide

4-hydroxyimino-3-phenyl-5(4H)-isoxazolone