To furnish immediate evidence the peculiar improvement of catecholaminergic activity during the brain in animals dealt with with a small dose of (−)deprenyl is unrelated to MAO inhibition, we designed within the early '90s a spouse and children of deprenyl analogues devoid in the MAO-B inhibitory outcome (Knoll et al https://ppaphcl22964.mdkblog.com/35952782/an-unbiased-view-of-ppap-hcl