| http://www.w3.org/ns/prov#value | - hiourea, a guanidyl, or a carbamoyl group; Z is selected from the group consisting of spermiyl, spermidiyl, amino acid, peptidyl, diaminoalkyl, and polyamine; R7 and R8 are independently H or a carbohydrate, preferably H; m and n are as defined above; and l is an integer from 1 to about 4; wherein Q, R1, R4, r, u, m and n are as defined above; R2 and R5, independently of one another, are selected
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