| http://www.w3.org/ns/prov#value | - This invention provides a biologically active agent, wherein the agent is a compound of the formula: wherein n is 1 or 2; R1 is hydrogen or alkyl having from 1 to 7 carbon atoms; R14 is hydroxy or hydrogen; and A is phenyl, unsubstituted or substituted by 1 or 2 groups selected from halo, alkyl having 1 or 2 carbon atoms, perfluoromethyl, alkoxy having 1 or 2 carbon atoms, and perfluoromethoxy; or
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