| abstract |
Provided are a tetracyclic compound represented by the formula (I): n n n n n n n n n n [in the formula (I), the formula (A) represents a benzene ring or the like,n X represents CH or a nitrogen atom, Q represents —O— or the like, R 1 , R 2 , and R 3 may be the same or different and each represent a hydrogen atom or the like, l, m, and n each represent an integer from one to the maximum substitutable number of substituents, and R 4 and R 5 may be the same or different and each represent a hydrogen atom or the like], or a pharmaceutically acceptable salt thereof, and the like. |