Drimane sesquiterpene esters produced by Aspergillus insuetus BF-1613 as inhibitors of sterol O-acyltransferase
摘要
A new drimane sesquiterpene ester, designated insuetusolate (1), and four reported ones (2–5) were isolated from a culture broth of Aspergillus insuetus BF-1613. The chemical structure of 1 was elucidated by extensive spectroscopic analyses, including MS and NMR. Compound 1 has a drimane-type sesquiterpene core with a 2’E,4’E,6’E-octatrienoate side chain. All these drimane sesquiterpene esters inhibited both sterol O-acyl transferase 1 (SOAT1) and 2 (SOAT2), but exhibited slightly potent inhibition against SOAT1 than SOAT2 with selectivity index (SI) [log (IC50 for SOAT1/ IC50 for SOAT2)] values ranging from −0.24 to −0.94.