camptothecin
...that synthetic analogues of camptothecin, a cytotoxic quinoline alkaloid isolated from the Chinese tree Camptotheca acuminata, are being used as anti-cancer drugs?
...that synthetic <a class="mw-redirect" href="./Analog_(chemistry)" id="mwC-I" rel="mw:WikiLink" title="Analog (chemistry)">analogues</a> of <b id="mwC-M"><a href="./Camptothecin" id="mwC-Q" rel="mw:WikiLink" title="Camptothecin">camptothecin</a></b>, a <a href="./Cytotoxicity" id="mwC-U" rel="mw:WikiLink" title="Cytotoxicity">cytotoxic</a> <a href="./Quinoline" id="mwC-Y" rel="mw:WikiLink" title="Quinoline">quinoline</a> <a href="./Alkaloid" id="mwC-c" rel="mw:WikiLink" title="Alkaloid">alkaloid</a> isolated from the <a href="./China" id="mwC-g" rel="mw:WikiLink" title="China">Chinese</a> tree <i id="mwC-k"><a class="mw-redirect" href="./Camptotheca_acuminata" id="mwC-o" rel="mw:WikiLink" title="Camptotheca acuminata">Camptotheca acuminata</a></i>, are being used as <a href="./Chemotherapy" id="mwC-s" rel="mw:WikiLink" title="Chemotherapy">anti-cancer drugs</a>?