TY  - RPRT
TI  - 6alpha-substituted penicillins.
AU  - Y S Lo
AU  - J C Sheehan
PY  - 1975
DO  - 10.1021/jo00890a009
UR  - https://pubmed.ncbi.nlm.nih.gov/1133614/
ID  - 1133614
ER  -