The molecule is a member of the class of furofurans that is tetrahydrofuro[3,4-b]furan-2,4-dione substituted at positions 3 and 6 by methyl and butyl groups respectively (the 3R,3aR,6S,6aS-stereoisomer). It has a role as a fungal metabolite. It is a furofuran and a gamma-lactone.
(3R,3aR,6S,6aS)-6-butyl-3-methyl-3,3a,6,6a-tetrahydrofuro[2,3-c]furan-2,4-dione