"The tetra-valent aromatic hydrocarbon group having 6 to 14 carbon atoms, shown by A3 includes the same as examples of the tetra-valent aromatic hydrocarbon group having 6to 14 carbon atoms, shown by A1 in the above-described, general formula [1], and among others, the one shown by the above-described general formula, [9] is preferable." . . . .