The above-described “one or more sets” means that two or more sets of two groups adjacent to each other may simultaneously form the ring. For example, a case where R921 and R922 form a ring A by bonding with each other, and simultaneously R925 and R926 form a ring B by bonding with each other is represented by the following formula (XY-81).
A case where “two or more groups adjacent to each other” form a ring means that, for example, R921 and R922 form a ring A by bonding with each other, and R922 and R923 form a ring C by bonding with each other. A case where the ring A and ring C sharing R922 are formed, in which the ring A and the ring C are fused to the anthracene mother skeleton by three of R921 to R923 adjacent to each other, is represented by the following (XY-82).
The rings A to C formed in the formulas (XY-81) and (XY-82) are a saturated or unsaturated ring.
A term “unsaturated ring” means an aromatic hydrocarbon ring or an aromatic heterocyclic ring. A term “saturated ring” means an aliphatic hydrocarbon ring or an aliphatic heterocyclic ring.