A class of organic compounds that contain a four-membered lactam ring.
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4(3H)-Quinazolinone, 2-phenyl-3-[(3-phenyl-2-propenylidene)amino]-
cis-3-azido-2-oxo-4-(2-phenylethenyl)-1-azetidine
tert-butyl α-bromo-(p-methoxyphenyl)acetate
(4-nitrobenzylidene)(4-ethoxyphenyl)amine
