Patent ID: 8293752

Claim:
A compound of formula I: or a pharmaceutically acceptable salt thereof, wherein: Cy 1 is an optionally substituted 5 membered-aromatic ring having 1-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur; Cy 2 is an optionally substituted 6 membered aromatic ring having 1-2 heteroatoms, independently selected from nitrogen, oxygen, and sulfur; L 1 is an optionally substituted, straight or branched C 1-6 alkylene chain; L 2 is —C(O)N(R)—; each R is independently hydrogen or an optionally substituted C 1-6 aliphatic group; R 1 is hydrogen or an optionally substituted C 1-6 aliphatic group; each of R x and R y is independently selected from -halo, or —N(R 2 ) 2 ; and each R 2 is independently hydrogen or an optionally substituted C 1-6 aliphatic group.