| abstract |
The present invention relates to the compound of formula (I) wherein R 1A , R 1B , R 1C , and R 1D are hydrogen atom, etc., R 2A and R 2B are hydrogen atom, etc., R 3A , R 3B , R 3C , and R 3D are hydrogen atom, etc., L is bond, etc., V is C 1-6 alkylene, Q is optionally-substituted imidazole, or a pharmaceutically acceptable salt thereof, as a novel anti-tumor agent that targets CSCs which are thought to be closely involved in the persistent proliferation of malignant tumor, metastasis or recurrence of cancer, and resistance to anti-tumor agents. |