Argyrin H is a natural cyclic, non-ribosomal peptide[1].
References
[1] Wieland M, et al. The cyclic octapeptide antibiotic argyrin B inhibits translation by trapping EF-G on the ribosome during translocation. Proc Natl Acad Sci U S A. 2022 May 10;119(19):e2114214119. DOI:10.1073/pnas.2114214119
