| http://www.w3.org/ns/prov#value | - Preferred alkyl substituents of B or B??? are C1-C4-alkyl, in particular C1-C2-alkyl, which is substituted by one or more substituents selected from the group consisting of ???OH and ???NR6R6???, wherein R6 and R6??? are each independently of another hydrogen or C1-C4-alkyl, preferably hydrogen, methyl or ethyl and particularly preferably hydrogen or methyl, for example ???CH2???NH2, ???CH2???N(CH
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