2,2-dimethyltetrahydro-4,8-methano[1,3]dioxolo[4,5-d]oxepin-5(4H)-one 4,8-methano-1,3-dioxolo[4,5-d]oxepin-5(4H)-one, tetrahydro-2,2-dimethyl- InChI=1/C10H14O4/c1-10(2)13-7-5-3-6(8(7)14-10)9(11)12-4-5/h5-8H,3-4H2,1-2H