1. Synthetic Penicillin
2. Clarke, H. T., Johnson, J. R., and Robinson, R., The chemistry of penicillin, Princeton, in press.
3. du Vigneaud, V., Carpenter, F. H., Holley, R. W., Livermore, A. H., and Rachele, J. R., cf. (2) chapter 28.
4. du Vigneaud, V., Wood, J. L., and Wright, M. E., cf. (2) chapter 23.
5. STUDIES ON CRYSTALLINE dl-BENZYLPENICILLENIC ACID