| http://www.w3.org/ns/prov#value | - R1, R2, R4, R7 and R8 are each a hydrogen atom; R3 is the formula ???C(O)NR11R12, wherein R11 is a hydrogen atom and R12 is selected from the group consisting of pyridin-2-ylmethyl and 3,3,5-trimethylcyclohexyl; R5 is selected from the group consisting of 4-N,N-dimethylaminophenyl, 5-chloro-2-nitrophenyl, 4-bromo-2-thienyl, 2-butyl, 5-nitro-2-furyl, 4-bromophenyl, 2-thienyl, 3-thienyl, 3-cyanophen
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