<h3>Karl Barry Sharpless,&nbsp;An&nbsp;American chemist known for his work on stereoselective reactions. In 2001 he won a half-share of the Nobel Prize in Chemistry, &nbsp;117.5 X 112.5 mm&nbsp;Excellent Condition.</h3>

Autograph of Karl Barry Sharpless of American chemist.

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Autograph of German Physician Gerhard Ertl.

Autograph of German Physician Gerhard Ertl.

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