1-Nitro-2-(phenylsulfonyl)benzene 1-Nitro-2-(phenylsulphonyl)benzene 144113-81-5 2-Nitrophenyl phenyl sulfone 31515-43-2 Benzene, 1-nitro-2-(phenylsulfonyl)- EINECS 250-672-6 NSC 624231 Sulfone, o-nitrophenyl phenyl o-Nitrophenyl phenyl sulfone