(7\'S,8\'R)-4-Hydroxy-3\',4\',5-trimethoxy-7,8-seco-2,7\'-cyclolignan-7,8-dione 2-[(1R,2S)-1-(3,4-dimethoxyphenyl)-2-methyl-3-oxobutyl]-4-hydroxy-5-methoxybenzaldehyde 2-[1-(3,4-Dimethoxy-phenyl)-2-methyl-3-oxo-butyl]-4-hydroxy-5-methoxy-benzaldehyde 7,8-Seco-Holostylone A InChI=1/C21H24O6/c1-12(13(2)23)21(14-6-7-18(25-3)20(8-14)27-5)16-10-17(24)19(26-4)9-15(16)11-22/h6-12,21,24H,1-5H3/t12-,21-/m1/s benzaldehyde, 2-[(1R,2S)-1-(3,4-dimethoxyphenyl)-2-methyl-3-oxobutyl]-4-hydroxy-5-methoxy-