27YLU75U4W 3I91332OPG 5,5-dimethyl-1-pyrroline-1-oxide 5,5-dimethyl-2-phenyl-1-pyrroline-N-oxide 58134-17-1 7170JZ1QF3 Cyclic N-Oxides GFQ4MMS07W Hydroxylamines Journal Article Nitrogen Oxides Organometallic Compounds Organosilicon Compounds Phosphorus Phosphorus Compounds Research Support, Non-U.S. Gov't Silicon Z4152N8IUI nitrones nitroxyl phenyl-N-tert-butylnitrone