vitamin C
... that in 1934 vitamin C was the first synthetic vitamin to be trademarked (as Redoxon) and marketed?
... that in 1934 <b id="mwB5g"><a href="./Vitamin_C" id="mwB5k" rel="mw:WikiLink" title="Vitamin C">vitamin C</a></b> was the first synthetic vitamin to be trademarked (as <a href="./Redoxon" id="mwB5o" rel="mw:WikiLink" title="Redoxon">Redoxon</a>) and marketed?