| 摘要 |
The present invention relates to UCK14 compounds having antitumor activity which are represented by the formula: <CHEM> wherein R<1> is hydrogen or -COOC(CH3)3; and R<2> and R<3> are taken together to form -CH2-, or each R<2> and R<3> independently are hydrogen, and pharmaceutically acceptable salts thereof.n |
