| http://www.w3.org/ns/prov#value | - X is a direct bond or a radical selected from the group consisting of ???O???, ???NR???, ???S???, ???SO???, ???SO2???, and ???PO3???; R, R1 and R2 are independently a radical selected from the group consisting of H, an alkyl of 1-10 carbon atoms; an aralkyl of 7-16 carbon atoms; and an aryl; n is 0-12; G is a cationic radical selected from the group consisting of ???N(R???)(R???)(R??????), ???(O)N
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