In the title compound, C11H12N2S2, the dithio­carbazate group adopts an EE configuration with respect to the C=C and C=N bonds of the propenyl­idene group. The atoms of the propenyl­idene and dithio­carbazate unit are essentially co-planar, with a maximum deviation of 0.058 (1) Å; the phenyl ring forms a dihedral angle of 18.3 (1)° with this fragment. In the crystal, mol­ecules form inversion dimers via pairs of N—H⋯S hydrogen bonds involving the terminal S atom.

The non-H atoms of the title compound, C10H12N2O2, are approximately coplanar with the exception of those at the ends: the terminal allyl carbon atom and terminal hydrazide nitrogen atom are displaced from the mean plane by 0.67 (2) and 0.20 (2) Å, respectively. In the crystal, the molecules are linked by N—H...O and N—H...N hydrogen bonds, which give rise a two-dimensional network propagating in the (001) plane.

Compounds obtained from natural sources play significant role to identify various novel drug molecules. This study was designed to investigate parasitic susceptibility of methanolic extract from the Pleurotus highking, an edible mushroom commercially cultivated in Bangladesh against Pheretima posthuma. Extraction was carried out by continuous hot percolation method using methanol as a solvent. Four concentrations (10, 20, 40 and 80 mg/ml) of the extract were used for screening and results were expressed in terms of the time paralysis and death of worms. The extract exhibited promising antiparasitic activity at the concentration of 80 mg/ml. Albendazole and distilled water were used as reference standard and control, respectively. The extract showed its activity in the dose and time dependent manner. This is the first report of the antiparasitic activity of methanolic extract of P. highking.

The complete molecule of the title compound, C26H34O6, is generated by a crystallographic centre of symmetry and the central octyl chain adopts an extended conformation. In the extended structure, weak C—H...π interactions link the molecules.

In the title complex, [Ni(C14H15N2O2)2], the nickel(II) atom exhibits a square-planar coordination geometry, being coordinated by two negatively charged N,O chelating ligands in a trans configuration, with the metal located on a crystallographic center of symmetry. The X-ray structural characterization showed the complex to be disordered over two orientations with refined occupancies of 0.898 (2) and 0.102 (2). The whole molecule is close to planar, the five- and six-membered rings subtending a dihedral angle of 7.5 (2)°. The crystal packing is supported by C—H...π and C—H...O interactions that form a di-periodic layered network.