prov:value
| - RMULA (H)wherein W is C2-6 alkylene or a divalent group of the formula,FORMULA (I)wherein Me' is Cu, Ni, Co1/2 or Cr1/2FORMULA (J)wherein Pc is copper phthalocyanine or nickel phthalocyanine moiety, a, b and c satisfy the following formulas, 1 < a < 2, 0 < b < 2, 1 < c < 2 and a + b +c < 4, and B is a divalent group of the following formula,FORMULA (K)wherein R7 and R8 independently of one another
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