IUPAC:5-[7-(acetyloxy)-6',7-dimethyl-6,8-dioxo-4,6,7,8-tetrahydrospiro[2-benzopyran-3,2'-oxan]-5-yl]-6',7-dimethyl-6,8-dioxo-4,6,7,8-tetrahydrospiro[2-benzopyran-3,2'-oxan]-7-yl acetate
IUPAC:5-[7-(acetyloxy)-6',7-dimethyl-6,8-dioxo-4,6,7,8-tetrahydrospiro[2-benzopyran-3,2'-oxan]-5-yl]-6',7-dimethyl-6,8-dioxo-4,6,7,8-tetrahydrospiro[2-benzopyran-3,2'-oxan]-7-yl acetate