The molecule is a member of the class of xanthones that is agnestin A in which the double bond between positions 3 and 4 has been reduced and the carboxlic acid group at position 1 forms a single bond with the carbon atom at position 3 resulting in a cyclic ester. It has been isolated from the fungus Paecilomyces variotti. It has a role as a fungal metabolite. It is a member of phenols, a member of xanthones, a secondary alcohol, a gamma-lactone and an organic heterotetracyclic compound.
(1R,13S,16R)-5,16-dihydroxy-13-methyl-10,14-dioxatetracyclo[11.2.1.02,11.04,9]hexadeca-2(11),4,6,8-tetraene-3,15-dione