prov:value
| - rogen atom, or at least R3, R5, R8 and R10 are groups other than hydrogen atom, the case wherein R3 and R10 or R4 and R9 are an aryl group which may optionally be substituted is excluded; and, when n is 2, the formula (I) described above is a pentacene derivative represented by formula (Ia) below: (wherein A1 and A2 have the same significance as described above; R1, R2, R3, R4, R5a, R5b, R6, R7, R
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