| http://www.w3.org/ns/prov#value | - , C2-C6alkynyl, C3-C6cycloalkyl, C1-C10alkoxy (???O???C1-C10alkyl), C6-C18aryl, C5-C10heteroaryl, C1-C10aralkyl, polyethylenglycol, C1-C6alkyl-O???CH2???(CH2???O???CH2)z???CH2???OH and C1-C6alkyl-(O???CH2???CH2)y???OH;each of n and m, independently of each other is an integer between 2 and 10;each of z and y, independently of each other is an integer between 2 and 10; andX is a negatively charged
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