N -oxides 3 can be deoxygenated by catalytic hydrogen transfer using ammonium formate or ( 3c ) hydrogenation using PtO 2.是什么意思_N -oxides 3 can be deoxygenated by catalytic hydrogen transfer using ammonium formate or ( 3c ) hydrogenation using PtO 2.在线翻译_英语_读音_用法_例句