| abstract |
A polyketide or glycosylated polyketide which has the formula: n n nwherein R* is methyl or ethyl;n neach of R 1 -R 6 is methyl;n nX 1 is OH or H; and/orn nX 2 is=O, OH or H;n nX 3 is OH or H;n nX 4 is OH or H;n na pi bond is present at positions 10-11, 8-9, 4-5 and/or 2-3; and wherein at least one of the following characteristics is present:n nX 1 is H;n nX 2 is OH or H;n nX 3 is H;n nX 4 is H; orn na pi bond is present at positions 10-11, 8-9, 4-5 and/or 2-3. |