a term used to describe organic compounds that contain a single ring structure.
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benzyl 6α-ethynyl-6β-(trifluoromethanesulfonato)penicillinate
Cuprous iodide
2-Azabicyclo[2.2.0]hex-5-ene-2-carboxylic acid, phenylmethyl ester
2-<3-phenylacetamido-4-thiol-(3R,4R)-azetidin-2-on-1-yl>-trichloroethyl acetate
