3-(9H-Fluoren-9-yl)-1,3-diphenyl-propan-1-one.

In the title compound, C(28)H(22)O, the fluorene ring system is approximately planar [maximum deviation = 0.044 (2) Å] and forms dihedral angles of 69.88 (6) and 89.46 (6)° with the phenyl rings. The crystal packing is stabilized by weak π-π stacking inter-actions, with centroid-centroid distances of 3.7172 (13) and 3.7827 (11) Å.

3-(9H-Fluoren-9-yl)-3-(4-methyl-phen-yl)-1-phenyl-propan-1-one.

In the title compound, C(29)H(24)O, the phenyl and methyl-phenyl rings are approximately perpendicular to each other, making a dihedral angle of 87.67 (10)°, and are oriented at dihedral angles of 62.49 (9) and 84.77 (7)°, respectively, to the nearly planar fluorene ring system [maximum deviation = 0.077 (2) Å] In the crystal, weak C-H⋯π inter-actions are observed.

Top note compounds of Chinese traditional bacteria-fermented soybean.

Top note compounds of Chinese traditional bacteria-fermented soybean were analysed by using headspace sampler, GC and GC-MS. Thirty-three note compounds were identified in Chinese traditional bacteria-fermented soybean. Among them, 28 compounds are responsible for the Chinese traditional bacteria-fermented soybean top note. 3-Methylbutanal (6.690%), amyl nitrite (12.976%), 2-methylpropanoic acid (4.014%), 2,3-butanediol (2.171%), 3-methylbutanoic acid (14.273%), 2-methylbutanoic acid (11.866%), benzeneacetaldehyde (1.422%), nonadecane (3.195%), eicosane (5.331%), heneicosane (23.418%) and docosane (5.011%) were all found in concentrations higher than 1.0% (calculated as % peak area of GC analysis using a DB-5 column).