A polymer composed of @R05247@, @S05935-1@ or @C01186-1@. A polymer consisting of star macromolecules with arms identical with respect to @C01282@ and @D01569@ is considered to be regular. Analogously, a polymer consisting of comb macromolecules with the sub-chains between the branch points of the main chain and the terminal sub-chains of the main chain identical with respect to @C01282@ and @D01569@ and the side-chains identical with respect to @C01282@ and @D01569@ is considered to be regular.