<span class="inline-separated-list-container"><span class="simple-separated-list-item">dimethylxanthine (<a href="https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:28177" rel="noopener" target="_blank">CHEBI:28177</a>) </span><span class="list-separator"> / </span><span class="simple-separated-list-item">Purine alkaloids (<a href="http://www.genome.jp/dbget-bin/www_bget?cpd:C07130" rel="noopener" target="_blank">C07130</a>) </span><span class="list-separator"> / </span><span class="simple-separated-list-item">a small molecule (<a href="http://metacyc.org/META/new-image?type=COMPOUND&amp;object=CPD-12479" rel="noopener" target="_blank">CPD-12479</a>) </span></span>