Procognitive effects of NO-chimeras evaluated in the scopolamine-induced memory deficit model using the STPA task. Scopolamine was administered 30 min and drug was administered 20 min prior to the start of training and memory was tested 24 h after training and drug treatment. NO-chimeras, 28, 29, 32a, 32b, 42 and 43 (***, p<0.01, compared with vehicle), and 40 (**, p<0.05, compared with vehicle) significantly reversed the scopolamine induced memory deficit. Data were obtained from at least 5 mice per group.