To furnish direct proof which the peculiar enhancement of catecholaminergic action within the brain in animals addressed with a small dose of (−)deprenyl is unrelated to MAO inhibition, we formulated within the early '90s a spouse and children of deprenyl analogues devoid on the MAO-B inhibitory effect (Knoll et al https://ppap-hcl88764.canariblogs.com/not-known-factual-statements-about-ppap-hcl-45483175