я так понял, что имеется в виду некая маскировка соединения, в частности, для облегчения проникновения через ГЭБ... но вот как пофигуристее выразиться?

Indirect techniques, which are generally preferred, usually involve formulating the compositions to provide for drug latentiation by the conversion of hydrophilic drugs into lipid soluble drugs. Latentiation is generally achieved through blocking of the hydroxy, carbonyl, sulfate, and primary amine groups present on the drug to render the drug more lipid soluble and amenable to transportation across the blood brain barrier.

latentiation (la·ten·ti·a·tion) (la-ten”she-a´shən) the process of making latent; in pharmacology, the chemical modification of a biologically active compound to affect its absorption, distribution, etc., the modified compound being transformed after administration to the active compound by biological processes.

Так что не надо фигуристости, имхо. Просто модификация соединения для изменения его усвояемости.