octahydro-7,7,8a-trimethyl-2H-benzo[3,4]cyclobuta[1,2-b]pyran-5(8H)-one

3,4,4a,4b,6,7,8a,8b-Octahydro-7,7,8a-trimethyl-2H-benzo[3,4]cyclobuta[1,2-b]pyran-5(8H)-one