| http://www.w3.org/ns/prov#value | - The foregoing and other objects are realized by the present invention which provides novel compounds having the formula: ##STR2## wherein: R1 is C1 -C8 straight or branched alkyl; C2 -C8 straight or branched alkenyl; (C3 -C8 cycloalkyl)-Cp H2p - wherein p is an integer from 0 to 4, and wherein the 3- to 8-membered ring portion may optionally bear 1 to 4 C1 -C4 straight or branched alkyl substituen
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