| http://www.w3.org/ns/prov#value | - These include compositions of matter of the formula ##STR11## where n is an integer, L is a number less than 0.1n, m is less than 0.5n, a is zero or a number less than 10, X is a polynuclear aromatic, polyheteronuclear aromatic or metallopolyheteronuclear aromatic moiety and R is as recited above.
|
