... 1981, 34, 171. (7) Carpino, LA J. Am. Chem. SOC. 1957, 79, 98. 0022-2623/87/1830-0764 $01.50/0 0 1987 American Chemical Society Page 2. A New Class of Cephalosporins Scheme In Journal of Medicinal Chemistry, 1987, Vol. 30, No. 5 765 Table 11. ...