prov:value
| - CH2???C(R3)COOR4 (II) where R3 is hydrogen or a C1-C3 alkyl group, and R4 is a C1-C20 alkyl group, phenyl, benzyl, hydroxy-(C1-C4)-alkyl, alkoxy-(C1-C4)-alkyl, cyclopentyl, cyclohexyl, C1-C4-alkylfuryl, tetrahydrofuryl, C1-C4-alkyltetrahydrofuryl and combinations of these monomers thereof.
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