“…Some known biologically important natural products comprising a 2-pyrrolidinone unit are cotinine, a tobacco alkaloid, 15 doxapram, a respiratory stimulatant, 16 and ethosuximide, a succinimide containing anticonvulsant. 17 Moreover, substituted 2-pyrrolidinone derivatives have various therapeutic properties, for example, anti-cancer, 18 antitumor, 19 HIV-1 integrase inhibition, 20,21 antimicrobial, 22 antibacterial, 23 and anti-inflammatory. 24 In addition, the 2-pyrrolidinone moiety is used in the drug PI-091, consisting of anti-coagulant properties, as well as in Jatropham, which is an antitumor alkaloid (Figure 1, structures E and F ).…”