Patent ID: 8486969

Claim:
A compound having a structure wherein X is O; and A is a fused bicyclic ring system comprising: a C 3-5 alkyl ring moiety fused to a six-membered heteroaromatic ring having 1 or 2 N atoms in the ring; wherein the alkyl ring moiety forms the bond depicted as A-N in the structure, said alkyl ring moiety having 0 or 1 C 1-4 alkyl substituent; and the heteroaromatic ring has from 0 to 3 substituents independently consisting of: from 0 to 4 carbon atoms, from 0 to 10 hydrogen atoms, from 0 to 2 oxygen atoms, from 0 to 1 sulfur atoms, from 0 to 1 nitrogen atoms, from 0 to 3 fluorine atoms, from 0 to 1 chlorine atoms, and from 0 to 1 bromine atoms.