Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The HIV protease inhibitor ABT-378 (Lopinavir) is metabolized rapidly and extensively by CYP-3A4 catalyzed oxidation. Three of the major metabolites identified were synthesized and their antiviral (HIV) activities determined. ... A concise synthesis of the major metabolites M-1 and M-3/M-4 of ...