(2R,3R,4R,6aR)-2-hydroxy-6a-isopropyl-4-methyl-4-(3-oxobutyl)hexahydro-2H-cyclopenta[b]furan-3-yl rel-4-hydroxybenzoate 4-Hydroxy-benzoic acid 2-hydroxy-6a-isopropyl-4-methyl-4-(3-oxo-butyl)-hexahydro-cyclopenta[b]furan-3-yl ester InChI=1/C22H30O6/c1-13(2)22-12-11-21(4,10-9-14(3)23)18(22)17(20(26)28-22)27-19(25)15-5-7-16(24)8-6-15/h5-8,13,17-18,20,24,26H,9-12H2,1-4H3/t17-,18?,20-,21+,22-/m1/s Kuhistaferone benzoic acid, 4-hydroxy-, (2R,3R,4R,6aR)-hexahydro-2-hydroxy-4-methyl-6a-(1-methylethyl)-4-(3-oxobutyl)-2H-cyclopenta[b]furan-3-yl ester