Novel compounds having a perfluorinated five-membered ring structure such as a perfluorinated tetrahydrofuran ring structure, a perfluorinated dioxolan ring structure or the like.

The cyclic molecule (15) includes a cyclic skeleton (16) and at least one A functional group attached to the cyclic skeleton (16).

Included is a compound having an aromatic ring structure or hetero ring structure.

The above monomer component contains a monomer (M) which has both an organic ring structure and a chain moiety passing through the organic ring structure.

The aryl containing aliphatic carboxylic acid terminates with an aromatic ring structure.

The cyclic organic ligand is a cyclic organic compound with a ligating carbon atom in the cyclic ring structure of the cyclic organic compound which ligates with the transition metal by means of a double bound.

A modified cyclic controls the operation of the tank and the components thereof.

The compound contains B, Si, N, P, S or Se in the ring structure.

A compound having a benzotriazole ring structure and represented by general formula (1).

The compound has a substituted acridan ring structure represented by the General Formula (Chem 1).

The heteroelement siloxane polymers can have linear structure, cyclic structure, branched structure, and three-dimensional network structure and combinations thereof.

In this connection, A, Q1 and Q2 may combine together to form a ring structure.)

Bridgehead atoms are bonded to one or more bridges that interconnect one or more ring systems thereby forming a large cyclic structure.

Macrolides are a group of antibiotics with a complex cyclic structure.

Macrolides – antibiotics with a complex cyclic structure.