| http://www.w3.org/ns/prov#value | - wing groups (1) or (2) from which two primary hydroxyl groups are removed, (1) a mono- or polyether group represented by the formula HO--(Y--O--)m --H, wherein m is an integer of 2-50 and Y represents an alkylene or substituted alkylene group having 2-4 carbon atoms, (2) a polyglycerol group having a condensation degree of 2-50. 2.
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