A COMPOSITION WHICH COMPRISES SUBSTANCE REPRESENTED BY FORMULA (I), MEANINGS OF THE SYMBOLS THAT ARE INCLUDED IN THE FORMULA ARE GIVEN IN THE SPECIFICATION AS DEFINITIONS] A PHARMACEUTICALLY ACCEPTABLE CARRIER, AND A DISSOLUTION AID.IS USEFUL FOR IMPROVING SOLUBILITY, ORAL ABSORBABILITY AND/OR ABSORBABILITY IN BLOOD OF A POORLY WATER-SOLUBLE OR WATER INSOLUBLE TETRACYCLIC COMPOUNDS HAVING AN ALK INHIBITORY ACTIVITY THAT ARE USEFUL AS A PROPHYLACTIC AND/OR THERAPEUTIC AGENT FOR CANCER, DEPRESSION, AND COGNITIVE FUNCTION DISORDER.
