| http://www.w3.org/ns/prov#value | - ms or are a radical of the formula ##STR33## in which R3 and R4 each are alkyl or alkenyl of 12 to 22 carbon atoms and s' is 1 or 2, with the proviso that, if n is 3 or 4, the individual radicals X2 are the same or different, and Y1 is hydrogen, alkyl of 1 to 4 carbon atoms or a radical of the formula ##STR34## in which R5 and R6 each are alkyl or alkenyl of 12 to 22 carbon atoms and s" is 1 or 2,
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