O=C(Cc1cccc(Cl)c1)Nc1cncc2c1CCCC2
O=C(Cc1cccc(Cl)c1)Nc1cncc2c1OCCO2
O=C(Cc1cccc(Cl)c1)Nc1cncc2c1OCO2
Improve on ADA-UCB-6c2cb422-1 by increasing electron density from benzo ring to improve stacking over Glu 166 & ASN 142 Also increase H-bond strength to His 163. First suggestion from Tatiana Matviyuk.