| http://www.w3.org/ns/prov#value | - Those which are new were prepared according to the usual techniques, by reaction of ammonia with the alkyl acetimidates of the formula XII ##STR10## in an anhydrous low molecular weight alcohol such as methanol or ethanol In the formula XII, X and R1 have the meanings given above and R4 is an alkyl radical, preferably a methyl radical or an ethyl radical.
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