| http://www.w3.org/ns/prov#value | - in which at least one of B1 to B3 is a group represented by the formula: ???CH(CxHx+1){C(CyHy+1)(Cy???Hy???30 1)}??{C(CzHz+1)(Cz???Hz???+1)}?????, wherein x is an integer of 0 to 9, each of y, y???, z and z??? is independently an integer of 0 to 8, each of ?? and ?? is independently of 0 or 1 and x+y+y???+z+z???+??+?????9, and at least one of X1 to X10 is a protonic acid group:
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