| abstract |
An objective of the present invention is to provide compounds having potent antitumor activity. The compounds of the present invention are represented by formula (I) or a pharmaceutically acceptable salt or solvate thereof: n n n n n n n n n n wherein X=CH or N; Z=O or S; L=O or S; M=CR 10 R 11 , wherein R 10 and R 11 =H, alkyl, or alkoxy, NR 12 wherein R 12 =H or alkyl; R 1 , R 2 , and R 3 =H or optionally substituted alkoxy; R 4 =H; R 5-8 =H, halogen, alkoxy or the like; and R 9 =alkyl optionally substituted by -T-R 15 , or —NR 16 R 17 wherein T=O, S, or NH; R 14 =an optionally substituted carbocyclic or heterocyclic ring; and R 15-17 =alkyl or an optionally substituted carbocyclic or heterocyclic ring, or —NR 18 R 19 wherein R 18 and R 19 =H, optionally substituted alkyl, or an optionally substituted carbocylic or heterocyclic ring, or optionally substituted carbocyclic or heterocyclic ring. |