| http://www.w3.org/ns/prov#value | - alog and wherein R1 and R2 are the same or different C1 to C10 alkyl groups or an aryl groups. ???X???C(???O)???C(R1)H???C(???O)???R wherein X is CH2 for the beta diketone and X is O or NH for the beta keto ester, wherein R1 is a C1 to C10 alkyl group or an aryl group and wherein R is a C1 to C10 alkyl group or an aryl group for the ketones and R is H for the aldehyde analogs. ???X???C(???O)???C(R
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