In the course of a continuing search for tumor iii-hibitors of plant origin, aristolochic acid (I) was characterized as a tumor (; lderiocxrc~ irionia I m)-inhibitory principle from Aristolochiu indica. A subsequent report'desrribed H synthetic qqxwch to aristolochic acid arid related phenanthrene carboxylic:~ cids.~ We report herewith t> he synthesis and evaluntion of an: iristolochic acid arialog without oxygeii ether fuiictioiis: md with a saturated ring, namely 9- ...