| http://www.w3.org/ns/prov#value | - or alkyl, and R is hydrogen, alkyl, cycloalkyl, cycloalkyl-alkyl, phenyl or phenylalkyl), or ???(CR???R???)n???CONRaRb (where n is an integer from 0 to 5, R??? and R??? are independently hydrogen or alkyl, and Ra and Rb are, independently of each other, hydrogen, alkyl, phenyl or phenylalkyl).
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