prov:value
| - iphatic or heteroolefinic moiety comprising 3 to 150 carbon atoms together with 0-50 heteroatoms, especially 0, N, S, P and can incorporate one or more polar substituents selected from electron withdrawing, electron neutral, or electron donating groups with Hammett sigma para values between ???1.0 and +1.5 which can be non-ionic, zwitterionic, cationic or anionic comprising, for example, groups ??
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