The ionisation constant pK(a) for N2-acetylacyclovir was determined by
a spectrophotometric method. The value obtained for pK(a) of N2-acety
lacyclovir and previously reported pK(a) values (Kozjek et al., Acta P
harm. Jugosl., 38 (1988) 61-69; Kristl et al., Int. J. Pharm., 57 (198
9) 229-234.) for acyclovir and deoxyacyclovir were compared with the a
im of locating basic and acidic moieties in the molecules.