the permeabilities of a series of solutes of varying lipophilicity ( progesterone , estrone , testosterone , haloperidol , propranolol , antipyrine , caffeine , urea , acyclovir , ganciclovir , ribavirin , and glycerol ) were determined and an excellent correlation ( r = 0.97 ) was established between the permeability coefficients of the solutes and their log partition coefficients ( pc ) / ( mw ) 1/2 .
C0001367
acyclovir
C0017066
ganciclovir