... 15. Conrad, J. M.; Reay, W. A.; Polcyn, RE; Robinson, J. R. J. Parenteral Drug Assoc. 1978,32, 149-161. xp. ... The authors grate- fully thank Dr. An-Rong Lee for his help in the spectral analyses. 302 I Journal of Pharmaceutical Sciences Vol. 81, No. 3, March 1992