bath salts
... that so-called bath salts, a class of designer drug that became popular in the last decade, often contain mephedrone, which was first synthesised in the 1920s?
... that so-called <b id="mwA_c"><a href="./Bath_salts_(drug)" id="mwA_g" rel="mw:WikiLink" title="Bath salts (drug)">bath salts</a></b>, a class of <a href="./Designer_drug" id="mwA_k" rel="mw:WikiLink" title="Designer drug">designer drug</a> that became popular in the last decade, often contain <a href="./Mephedrone" id="mwA_o" rel="mw:WikiLink" title="Mephedrone">mephedrone</a>, which was first synthesised in the 1920s?