Further, {HEAD ~ the elimination} of extraneous material and the fractionation of mixtures of molecular species into the constituent species has resulted in achieving significantly greater potency and {TAIL ~ repeatability} in the resulting products than was possessed by the prior materials 
resulted in achieving
Further , { HEAD ~ the elimination } of extraneous material and the fractionation of mixtures of molecular species into the constituent species has resulted in achieving significantly greater potency and { TAIL ~ repeatability } in the resulting products than was possessed by the prior materials
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