| http://www.w3.org/ns/prov#value | - 3 taken together, R14 and R15 taken together and R16 and R17 taken together may form a heterocyclic group having five to seven ring members including the nitrogen atom of said amino or amido radical and which heterocyclic group may further contain one or more hetero atoms as ring members selected from oxygen, nitrogen and sulfur atoms and which heterocyclic group may be saturated or partially unsa
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