Method of purifying/concentrating sugar chain with sugar chain-trapping molecule and method of analyzing sugar chain structure

A substance that can specifically interact with sugar chains, the substance having a formula X—Y—Z,

• wherein X is selected from the group consisting of
• wherein X1 is substituted or unsubstituted alkylene or substituted or unsubstituted alkenylene, X2 and X3 are independently oxygen or sulfur, X4 is methylene or ethylene, R1 is hydrogen or alkyl, and R2 and R3 are independently hydrogen or alkyl, wherein the alkylene of X1 may comprise one or more atoms selected from oxygen and sulfur;
• wherein Y is a single bond;
• an optionally substituted alkylene in which at least one moiety selected from the group consisting of —O—, —S—, —S—S—, —N(Ra)—C(═O)—, —C(═O)—N(Rb)—, and phenylene which may be substituted, may intervene, wherein, Ra and Rb are independently hydrogen or alkyl;
• and
• wherein Z is selected from the group consisting of
• wherein Z1 is oxygen or sulfur, Z2 and Z3 are independently optionally substituted alkylene in which phenylene may intervene, or optionally substituted alkenylene in which phenylene may intervene, Z4 is oxygen or sulfur, R4 and R5 are independently hydrogen or alkyl.

A substance which can specifically interact with sugar chains, the substance having a formula X—Y—Z,

• wherein X is selected from the group consisting of
• wherein X1 is substituted or unsubstituted alkylene or substituted or unsubstituted alkenylene, X2 and X3 are independently oxygen or sulfur, X4 is methylene or ethylene, R1 is hydrogen or alkyl, and R2 and R3 are independently hydrogen or alkyl, wherein the alkylene of X1 may comprise one or more atoms selected from oxygen and sulfur;
• wherein when X is
• X2 is oxygen and Y is a single bond or an optionally substituted C3-C12 alkylene in which at least one moiety may intervene, which intervening moiety is selected from the group consisting of —O—, —S—, —S—S—, —N(Ra)—C(═O)—, —C(═O)—N(Rb)—, and phenylene which may be substituted, wherein Ra and Rb are independently hydrogen or alkyl, wherein the alkylene of Y is optionally substituted with alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, alkoxy, unsubstituted carbocyclic group, heterocyclic group, halogen, hydroxy, thiol, cyano, nitro, amino, carboxy, carbamoyl, acyl, acylamino, thiocarboxy, amide, substituted carbonyl, substituted thiocarbonyl, substituted sulfonyl or substituted sulfinyl;
• and wherein when X is
• R2 is alkyl;
• Y is a single bond;
• or an optionally substituted alkylene in which at least one moiety may intervene, which intervening moiety is selected from the group consisting of —O—, —S—, —S—S—, —N(Ra)—C(═O)—, —C(═O)—N(Rb)—, and phenylene which may be substituted, wherein Ra and Rb are independently hydrogen or alkyl, wherein the alkylene of Y is optionally substituted with alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, alkoxy, unsubstituted carbocyclic group, heterocyclic group, halogen, hydroxy, thiol, cyano, nitro, amino, carboxy, carbamoyl, acyl, acylamino, thiocarboxy, amide, substituted carbonyl, substituted thiocarbonyl, substituted sulfonyl or substituted sulfinyl;
• and
• Z is a polymerizable functional group comprising a moiety selected from the group consisting of
• wherein each R is independently hydrogen or alkyl.