| http://www.w3.org/ns/prov#value | - R4 is independently selected from groups shown below, in which R5 is a hydrogen atom or an alkyl chain having 1 to 4 carbon atoms. ##STR6## wherein G1 and G2 are as defined in formula (5), n is an integer, and G3 is a ##STR7## a ##STR8## an alkylene group, or a linking group to which a cross-linkable group having an SH group or a double bond or triple bond has been bonded.
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