Dj. Yang et al., NEW ISOCHROMOPHILONE-VII AND ISOCHROMOPHILONE-VIII PRODUCED BY PENICILLIUM SP FO-4164, Journal of antibiotics, 49(3), 1996, pp. 223-229
New isochromophilones VII and VIII were isolated from the culture brot
h of Penicillium sp. FO-4164. The structures were elucidated as 6H-2-b
enzopyran-6,8(7H)-dione, adienyl)-1,7,8a-trihydro-7,8a-dihydroxy-7-met
hyl-7 for isochrornophilone VII and 7,8,8a-tetrahydro-7,8-dihydroxy-7-
methyl-8-acetate for isochromophilone VIII. Isochromophiloncs VII and
VIII inhibited diacylglycerol acyltransferase activity with IC50 value
s of 20.0 and 127 mu M and acyl-CoA: cholesterol acyltransferase activ
ity with IC50 values of 24.5 and 47.0 mu M, respectively.