penicillins

https://doi.org/10.1351/goldbook.P04475
Substituted @P04470@ having the basic structure shown, including the natural penicillins and synthetic analogues.
P04475.png
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1356 [Terms] [Paper]