C12H14N2O2, monoclinic, P121/n1 (no. 14), a = 8.3327(3) A, b = 8.6077(3) A, c = 15.6537(8) A, ) = 99.996(3)°, V = 1105.7 A, Z = 4, Rgt(F) = 0.066, wRref(F) = 0.150, T = 295 K. Source of material A mixture of (5-nitro-2-piperidino)benzylidene paratoluene sulfonylhydrazone (5 g, 12.42 mmol) and natrium methoxide (2.g, 37.04mmol) in 1,4-dioxane (20ml) was heated under reflux for 1 hour. After cooling, the reaction mixture was filtered on silica gel andwashed several timeswith dichloromethame and acetone. The obtained filtrate was concentrated under reduced pressure and the residuewas purified by chromatography on silica gel using hexane/ethylacetate (90/10) to obtain orange crystals with 60 % yield. Experimental details The H atoms were placed at chemically acceptable positions. There were contrained using an appropriate riding model [d(C—H) = 0.93 1.00 A and Uiso(H) = 1.2 1.5 Ueq(parent atom)]. Discussion The tricyclic indolinic derivatives such as stobadine, pyrazinoindoline and azapinoindoline are very used compounds because of their important biological activity including several interesting properties. They have been approved to be useful in the treatment of many diseases [1-3]. The title compound has been synthesized to investigate its biological activity. The title molecule is constituted by coupling nitroindoline ring and piperidine ring (figure, top). In themolecule, the bond lengths [4] and angles are within normal ranges. By least squares planes method, it has found that piperidine ring occurs in a chair conformation. The crystal packing is due to hydrogen bonds C–H···O which link molecules into chains parallel to [101]. Z. Kristallogr. NCS 225 (2010) 45-46 / DOI 10.1524/ncrs.2010.0018 45 © by Oldenbourg Wissenschaftsverlag, Munchen Crystal: orange prism, size 0.40 × 0.45 × 0.45 mm Wavelength: Mo K+ radiation (0.71073 A) .: 0.91 cm−1 Diffractometer, scan mode: Nonius Kappa CCD, %/2, 2,max: 60.04° N(hkl)measured, N(hkl)unique: 3379, 3181 Criterion for Iobs, N(hkl)gt: Iobs > 2 ((Iobs), 2113 N(param)refined: 145 Programs: SIR92 [5], PLATON [6], CRYSTALS [7] Table 1. Data collection and handling. H(71) 4e 0.7748 0.2319 0.9928 0.0653 H(72) 4e 0.8790 0.2866 0.9229 0.0653 H(51) 4e 0.8542 0.5417 1.0593 0.0557 H(21) 4e 0.4501 0.6673 0.8205 0.0656 H(31) 4e 0.5429 0.8553 0.9288 0.0685 H(81) 4e 0.5514 0.1737 0.8983 0.0731 H(121) 4e 0.3389 0.3154 0.7725 0.0835 H(122) 4e 0.4106 0.4552 0.7238 0.0819 H(101) 4e 0.4551 0.0372 0.7569 0.0929 H(102) 4e 0.5760 0.0167 0.6894 0.0927 H(91) 4e 0.7234 0.0149 0.8344 0.0834 H(92) 4e 0.7697 0.1657 0.7816 0.0847 H(111) 4e 0.5582 0.2818 0.6582 0.1078 H(112) 4e 0.3747 0.2120 0.6495 0.1056 Table 2. Atomic coordinates and displacement parameters (in A). Atom Site x y z Uiso