http://www.w3.org/ns/prov#value | - Q is preferably (CH2)p+q???; ???(CH2)pCONH(CH2)q???; ???(CH2)pOCONH(CH2)q???; (CH2)[SO2NR???(CH2)q???; ???(CH2)p[NHCONH(CH2)q??? or ???(CH2)pCH(OH)???(CH2)q???, wherein R??? is a hydrogen or an alkyl group, and each of p and q is an integer of at least 0, provided that p+q is
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