1 CHQ Cyclo-(L-histidine-L-proline) inhibitor 1.000 2 QRP (3s,8as)-3-(1h-indol-3-ylmethyl)hexahydropyrrolo[1,2-a]pyrazine-1,4-dione 0.727 3 A1LYE (3~{S},6~{S})-3-(1~{H}-imidazol-4-ylmethyl)-6-propan-2-yl-piperazine-2,5-dione 0.700 4 A1LYF (3~{z},6~{S})-3-(1~{H}-imidazol-4-ylmethylidene)-6-propan-2-yl-piperazine-2,5-dione 0.700