| http://www.w3.org/ns/prov#value | - A compound according to claim 1 wherein:said R5 substituents are R10, where R10 is R11 or --Alk1 (R11)m, wherein m is an integer of 0 to 3 and Alk1 is straight or branched C1-6 alkylene, C2-6 alkenylene or C2-6 alkynylene, said Alk1 group containing from zero to three --O--, --S--, --N(R6)-- or --S(O)p -- groups, where p is 1 or 2; and R11 is halogen, amino (--NH2), substituted amino, nitro, cyano
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