| http://www.w3.org/ns/prov#value | - .2, n is an integer of 1 or 2, and R is hydrogen, a lower alkyl or a lower alkoxy group having from one to six carbon atoms; ##STR2##wherein R' is a moiety selected from the group consisting of hydrogen and a lower alkyl group having from one to six carbon atoms; and ##STR3##wherein R is a moiety selected from the group consisting of hydrogen and a lower alkyl group having from one to six carbon
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