(3R,5S,5aS,7aR)-3,6,6,7a-tetramethyl-2-oxo-2,3,4,5,5a,6,7,7a-octahydroindeno[1,7-bc]furan-5-yl rel-acetate Acetic acid 2a,4,4,7-tetramethyl-1-oxo-1,2a,3,4,4a,5,6,7-octahydro-2-oxa-cyclopenta[cd]inden-5-yl ester InChI=1/C16H22O4/c1-8-6-10(19-9(2)17)12-13-11(8)14(18)20-16(13,5)7-15(12,3)4/h8,10,12H,6-7H2,1-5H3/t8-,10+,12-,16-/m1/s Norbotrydialone acetate indeno[1,7-bc]furan-2(3H)-one, 5-(acetyloxy)-4,5,5a,6,7,7a-hexahydro-3,6,6,7a-tetramethyl-, (3R,5S,5aS,7aR)-