| http://www.w3.org/ns/prov#value | - 1-4alkyl and Rc is hydrogen, substituted or unsubstituted aryl, 5- or 6-membered heterocycle, C1-6alkyl or C1-6alkenyl, C3-7cycloalkyl, 5- to 7-membered carbocyclic or 7- to 10-membered bicyclic carbocyclic ring, benzofuryl, indolyl, azabicyclo C7-11cycloalkyl or benzopiperidinyl; Rf is hydrogen, substituted or unsubstituted C1-6alkyl or (CH2CH2O)pCH3 or (CH2CH2O)pH wherein p is an integer from 0
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