1: With hydrogen; palladium dihydroxide in methanol; water; trifluoroacetic acid Hydrogenolysis; P=2625.26 Torr; 36 h; 2: With hydrogenchloride T=150°C; Hydrolysis; 24 h; 3: With methyloxirane in ethanol Hydrolysis; 0.5 h; Heating; Further stages.;