| http://www.w3.org/ns/prov#value | - More specifically, R3, R4 and R5 in the polymer represented by the formula (IV) may preferably be hydrocarbon residues such as alkyl, aryl and aralkyl groups or derivatives thereof having 1 to 20 carbon atoms, or hydrogen atoms, whereas R6 and R7 may preferably be hydrocarbon residues having 1 to 20 carbon atoms, such as alkyl, aryl and aralkyl groups or derivatives thereof, furyl, pyridyl groups,
|
