| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel anticancer agent.SOLUTION: The anticancer agent includes a compound expressed by a formula (I) [wherein Aris a substituted or unsubstituted monocyclic aromatic group, X is an oxygen or a sulfur atom, Ris a substituted or unsubstituted aromatic group or -N=CH-Ar(wherein, Aris a substituted or unsubstituted aromatic group )] or its salt. |
