The latter is chromatographed on alumina in pure petroleum ether to give 2.7 g (78%) of compound no. 6 in the type of an analytically pure, clear oil. By effervescent gaseous HCl into the ethereal solution of stated compound, its solid white hydrochloride is precipitated and which, recovered by suction filtering and vacuum drying, decomposes at 180° C. D) 10.5 g (0.06M) of epoxide and 30.8 g