15,16-Epoxy-12-oxo-8(17),13(16),14-ent-labdatrien-20,19-olide 2-(2-Furan-3-yl-2-oxo-ethyl)-7-methyl-3-methylene-9-oxa-tricyclo[5.3.3.0^(1,6)]tridecan-10-one 3H-4,8a-propano-1H-2-benzopyran-1-one, 8-[2-(3-furanyl)-2-oxoethyl]hexahydro-4-methyl-7-methylene-, (4R,8R,8aR)- InChI=1/C20H24O4/c1-13-4-5-17-19(2)7-3-8-20(17,18(22)24-12-19)15(13)10-16(21)14-6-9-23-11-14/h6,9,11,15,17H,1,3-5,7-8,10,12H2,2H3/t15-,17?,19+,20-/m1/s rel-(1R,4aR,5R)-5-[2-(3-furyl)-2-oxoethyl]-1-methyl-6-methyleneoctahydro-2H-1,4a-(methanooxymethano)naphthalen-9-one