prov:value
| - sting of alkyl, cycloalkyl, alkenyl, aryl, and aralkyl, G is a (poly)oxyalkylene group having the formula ##STR5## in which R1 is a hydrogen atom, a monovalent hydrocarbyl group selected from the group consisting of alkyl, cycloalkyl, alkenyl, aryl and aralkyl, or an acyl group, and r, s and t are zero or a positive integer, wherein s and t are not simultaneously equal to zero, and Ga is the same
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