5-Methyl-N-[2-nitro-4-(trifluoromethyl)phenyl]-1H-pyrazole-3-amine: a chain of hydrogen-bonded R(2)(2)(6) and R(2)(2)(16) rings.

The molecular skeleton of the title compound, C(11)H(9)F(3)N(4)O(2), is almost planar and exhibits a polarized (charge-separated) electronic structure in the nitroaniline portion. Molecules are linked by N-H···N and C-H···O hydrogen bonds to form a chain in which centrosymmetric R(2)(2)(6) and R(2)(2)(16) rings alternate.

Chemical composition and antibacterial activity of the essential oil of Retrohpyllum rospigliosii fruits from Colombia.

The essential oil from fruits of Retrophyllum rospigliosii (Pilger) C.N. Page grown in Colombia was analyzed by GC and GC/MS. Ninety-one compounds were identified, of which the most prominent were limonene (37.7%) and alpha-pinene (16.3%). The in vitro antibacterial activity of the essential oil was studied against seven bacterial strains using the disc diffusion method. The strongest activity of the oil was against the Gram-positive bacterium Bacillus cereus.