| 摘要 |
A compound according to Formula (I), hereinbelow:wherein A represents a covalent bond, or a 1,2, 1,3 or 1,4-disubstituted aryl amine ring selected from the group consisting of: whereinR is independently selected from the group consisting of H, OMe, Cl, Br, F, NO2, and CN;n is an integer from 1 to 4;each X is independently selected from the group consisting of H, Br, CH3, NO2, CN, and NR1R2;each Ar is independently optionally substituted phenyl or an optionally substituted 5 or 6 membered heterocyclic ring comprising one or more heteroatoms selected from N, O and S; andR1 and R2 are, independently, hydrogen or C1-4 alkyl, branched or cyclic, optionally containing O or N.
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