| http://www.w3.org/ns/prov#value | - In a preferred embodiment, R1 and R9 are limited to hydrogen or methyl groups; R2 and R8 are hydrogen, methyl or substituted methyl groups such as methanol, formate, methyl amine, etc.; R3, R4, R6 and R7 are hydrogen, short alkyl, short substituted alkyl groups or acrylate derivatives such as trimethoxyalkylsilylacrylate; R5 is hydrogen or hydroxy.
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