| http://www.w3.org/ns/prov#value | - y the following formula ##STR28## wherein R and l are as defined above, (c) compounds represented by the following formula ##STR29## wherein A is --O--CH2 CH2 O)k, --OCH2 CH2 CH2 O--, ##STR30## i, j and k are an integer of 1 to 10, and R is as defined above, (d) compounds represented by the following formula ##STR31## wherein R and i are as defined, (e) compounds represented by the following formu
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