1.
Eur J Med Chem
; 93: 431-42, 2015 Mar 26.
Artigo
em Inglês
| MEDLINE
| ID: mdl-25728024
RESUMO
A series of methyl ursolate 3-O-ß-chacotrioside analogs have been designed, synthesized and evaluated as H5N1 entry inhibitors based on a small molecule inhibitor saponin 3 previously discovered by us. Detailed structure-activity relationships (SARs) studies on the aglycone of compound 3 indicated that both the type of pentacyclic triterpene and the subtle modification of ursolic acid as an aglycon had key influences on the antiviral activity. These results suggested that either the introduction of a disubstituted amide structure at the 17-COOH of ursolic acid or alteration of the C-3 configuration of ursolic acid from 3ß-to 3α-forms was helpful to significantly improve the selective index while keeping their antiviral activities.