from aqueous solutions of phenazone , aminophenazone , propyphenazone , nifenazone , morazone , noramidopyrine , 4-aminophenazone and isopropylaminophenazone , uv irradiated at lambda = 254 nm in oxygen free atmosphere as well as in the presence of air , 24 decomposition products were isolated and identified as derivatives of pyrazoline , pyrazolidinone , imidazoline , hydantoin , aziridine , phenylhydrazine and aniline .
C0002586
aminophenazone
C0002696
4-aminophenazone