Patent ID: 7632972

Claim:
A compound having formula: and salts thereof; where: n is 0 or I and m is 2; R 4 of the —NR 4 — group is hydrogen; one of the CH 2 groups of the —(CH 2 ) n — or —(CH 2 ) m — groups that is not linked to —CO— or —NR 4 — can be replaced with an oxygen atom; one or more of the carbons of the —(CH 2 ) n — or —(CH 2 ) m — groups can be substituted with one or two non-hydrogen substituents selected from halogens, alkyl groups having 1 to 3 carbon atoms, or alkoxy groups having from 1 to 3 carbon atoms; a —CH 2 —CH 2 — group of either or both of the —(CH 2 ) n — or —(CH 2 ) m — groups can be replaced with a —CR 4 ═CR 4 — groups where each R 4 group therein is, independently, a hydrogen or an alkyl group; A is an optionally substituted triphenyl methyl group; and B is an optionally substituted phenyl ring, wherein the phenyl rings of A and B are optionally substituted with one or more halogens, one or more alkyl groups having 1 to 3 carbon atoms, one or more alkoxy groups having from 1 to 3 carbon atoms or combinations of such substituents.