1: With triethylamine in methanol T=20°C; 0.166667 h; 2: With sodium tetrahydroborate in methanol T=20°C; 3 h; 3: With hydrogenchloride; methanol; water; sodium hydrogencarbonate more than 3 stages;

sodium tetrahydroborate; sodium carbonate in isopropyl alcohol T=20°C; 3 h;

lithium aluminium tetrahydride in diethyl ether T=20°C; 2 h;