| http://www.w3.org/ns/prov#value | - ula: ##STR18## wherein R is an alkyl group, X is selected from the group consisting of fluoride, chloride, bromide, iodide, and astatide, and R', R, and R' are each independently selected from the group consisting of alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, arylalkyl groups, and substituted arylalkyl groups, wherein R, R', R and R' are either the same as or
|
