An object of the invention is to provide adhesive materials which exhibit high adhesive strength, and compounds which can be blended with the adhesive materials. The invention provides compounds represented by the general formula (1) below, in which the core (X) below and the terminal group (Y1) below are bonded to each other: X(Y1)n1 (1) (in the general formula (1), n1 represents the number of terminal groups (Y1) bonded to the core (X), and n1 is equal to the valence of the core (X) ； the core (X) is a C1-200 polyvalent organic group having a valence of not less than 3 containing an oxygen atom or a nitrogen atom in which an atom bonded to the terminal group (Y1) is the oxygen atom or the nitrogen atom； and the terminal group (Y1) is a specific phosphorus-containing group, a specific (meth)acryloyl group-containing group (Y2), a (meth) acryloyl group, a C1-20 hydrocarbon group or a hydrogen atom, and a plurality of terminal groups (Y1) may be the same as or different from each other, with the proviso that among all the terminal groups (Y1) in the compound represented by the general formula (1), one or more terminal groups are specific phosphorus-containing groups, and one or more terminal groups are (meth)acryloyl group-containing groups (Y2)).
