| http://www.w3.org/ns/prov#value | - enzyloxy, cyano and alkanoyl; wherein R18 and R19 may be taken together to form oxo or exomethylene; wherein each of R20 and R21 is independently selected from hydrido, alkyl, haloalkyl, phenyl, hydroxyalkyl and alkoxyalkyl; wherein each of m and n is a number independently selected from zero to three, inclusive;
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