Reference

Search for REF=[4469].

4469
Nagarajan, R., Boeck, L. D., Gorman, M., Hamill, R. L., Higgens, C. E., Hoehn, M. M., Stark, W. M. and Whitney, J. G.
β-Lactam antibiotics from Streptomyces.
J. Am. Chem. Soc. 93: 2308-2310, 1971.
DOI: 10.1021/ja00738a035.