Continuing a study of the alkaloids of the epigeal part of Nitraria komarovii lljin et Lava collected in June 1978 in the environs of Krasnovodsk, the ethereal material of the pH 4 fraction from polybuffer separation of the base mixture was subjected to chromatographic separation. A new alkaloid, komaroine (I), with composition C28H38N2 (mp 144-145°C, petroleum ether-CH2Cl2), was isolated from the chloroform eluate. Mass spectral analysis of (I) showed ions at m/z 286 (M+), 271 (M-15), 257 (M-29), and 243 (M-43), indicating a propyl group. PMR spectrum signals (0.85 ppm triplet, 3H; 2.58 ppm triplet, 2H; 1.58 ppm multiplet, 2H) confirmed an N-propyl group bound to an aromatic ring. UV spectrum (ethanol) showed maxima at 215, 235, 280, 290, 350 nm (log ε 4.44, 4.42, 4.12, 4.12, 3.81), with bathochromic shifts in acid medium, characteristic of β-carboline derivatives. IR spectrum showed bands for o-disubstituted benzene (750 cm⁻¹), indole nucleus (1460, 1505, 1570, 1630 cm⁻¹), and saturated C-H (2860, 2870, 2930, 2965 cm⁻¹). Dehydrogenation of nitrarine (II) yielded komaroine, supporting structure elucidation. Thus, komaroine is 1-(3'-propylphenyl)-β-carboline. For the new alkaloid stenanzamine (I, C27H43NO2) isolated from Rhinopetalum stenantherum Regel, IR spectrum showed bands for OH (3400, 1070 cm⁻¹), trans-quinolizidine (2775 cm⁻¹), and C=C (1660 cm⁻¹). Mass spectrum (m/z 413 M⁺) indicated a C-nor-D-homosteroid alkaloid of the cevine group. PMR spectrum (CDCl3) had signals for 19-CH3 (0.93 ppm singlet), 21-CH3 and 27-CH3 (1.00 and 1.82 ppm doublets), and hydroxy-geminal protons (3.78, 3.58 ppm). Acetylation of (I) gave diacetylstenanzamine (II, M⁺ 497), whose IR (ester C=O, no OH) and PMR (acetyl methyls, acetoxy-geminal protons) confirmed two hydroxy groups. Spectral analyses suggested (I) has a cevanine heterocyclic skeleton with two secondary hydroxy groups and a tetrasubstituted double bond. IR bands (1070 cm⁻¹ for I, 1030 cm⁻¹ for II) and PMR of II confirmed one hydroxy group at C3 (β orientation). Periodic acid oxidation showed no vicinal hydroxyls.