PYRIPYROPENES, NOVEL INHIBITORS OF ACYL-COA - CHOLESTEROL ACYLTRANSFERASE PRODUCED BY ASPERGILLUS-FUMIGATUS .2. STRUCTURE ELUCIDATION OF PYRIPYROPENE-A, PYRIPYROPENE-B, PYRIPYROPENE-C AND PYRIPYROPENE-D
Yk. Kim et al., PYRIPYROPENES, NOVEL INHIBITORS OF ACYL-COA - CHOLESTEROL ACYLTRANSFERASE PRODUCED BY ASPERGILLUS-FUMIGATUS .2. STRUCTURE ELUCIDATION OF PYRIPYROPENE-A, PYRIPYROPENE-B, PYRIPYROPENE-C AND PYRIPYROPENE-D, Journal of antibiotics, 47(2), 1994, pp. 154-162
The structures of pyripyropenes A, B, C and D, novel acyl-CoA: cholest
erol acyltransferase (ACAT) inhibitors, were determined mainly by spec
troscopic studies including various NMR measurements. Pyripyropenes ha
ve a common structure which consists of pyridine, alpha-pyrone and ses
quiterpene moieties. One of the three O-acetyl residues in the sesquit
erpene moiety of pyripyropene A is replaced with an O-propionyl residu
e in pyripyropenes B, C and D.