| http://www.w3.org/ns/prov#value | - hydrogen, alkyl radicals having from 1 to 4 carbon atoms, phenyl and substituted phenyl radicals, wherein x is an integer from 0 to 4, y is an integer from 0 to 11-x, wherein m is 0 or 1, n is an integer from 1 to 3, wherein A is selected from the group consisting of ##STR8## wherein R7 and R8 are selected from the group consisting of hydrogen, alkyl radicals having from 1 to 4 carbon atoms and ar
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