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! R8 D ! ! <br /> W4Chart 1 <br /> C(ppm) <br /> 8E-10 <br /> 7E-10 <br /> 6E-10 <br /> 5E-10 <br /> 4E-10 <br /> 3E-10 <br /> 2E-10 <br /> 1E-10 <br /> 0 - <br /> 0 10 20 30 40 50 60 70 80 90 100 <br /> Page 1 <br />