... H .NHR,R, H OH J 0 VI I_\ d 'H V Scheme I 1910 / Journal of Pharmaceutical Sciences Page 4. Table 111-Substituent Effect of Substituted Amino Group on Rate Constants for Hydrolysis of 5-Aminodibenzo [a,d Icycloheptenes, about 8 X lo-& Ma, in 0.1 N HC1 ...