| http://www.w3.org/ns/prov#value | - is, the water-soluble, respectively sulfuric acid-soluble sulfato compound can be isolated after addition of the sulfuric acid solution toice-water.The same method can be used to prepare the compounds of the general formula (8) in which Y stands for the .beta.-phosphatoethyl group by reaction with a suitable and customary phosphating agent, such as phosphoric acid, polyphosphoric acid orphosphorus
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