(3aR,4R,5Z,7aR,8S,11aS,14E)-8-hydroxy-8-isopropyl-5,11a,14-trimethyl-2,9,10-trioxo-2,3,3a,4,7,7a,8,9,10,11a,12,13-dodecahydrofuro[3',2':7,8]cycloundeca[1,2-b]pyran-4-yl rel-acetate Acetic acid 15-hydroxy-15-isopropyl-1,4,11-trimethyl-7,16,17-trioxo-6,18-dioxa-tricyclo[12.4.0.0^(5,9)]octadeca-4,11-dien-10-yl ester Atranone K InChI=1/C24H32O8/c1-12(2)24(29)17-8-7-13(3)19(30-15(5)25)16-11-18(26)31-20(16)14(4)9-10-23(17,6)32-22(28)21(24)27/h7,12,16-17,19,29H,8-11H2,1-6H3/b13-7-,20-14+/t16-,17+,19?,23+,24+/m1/s furo[3',2':7,8]cycloundeca[1,2-b]pyran-2,9,10(3H)-trione, 4-(acetyloxy)-3a,4,7,7a,8,11a,12,13-octahydro-8-hydroxy-5,11a,14-trimethyl-8-(1-methylethyl)-, (3aR,4R,5Z,7aR,8S,11aS,14E)-