| http://www.w3.org/ns/prov#value | - R3 preferably is a non-electron withdrawing group, including non-electron withdrawing moieties such as hydrogen, a hydrocarbyl-containing group, a hetero-acyclic group, a heterocyclic group, or a group having the formula (CH2X)bE in which X and E are defined as above and b is a whole number from 0 to 100;
|
