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ACS Omega 2025, XXXX, XXX, XXX-XXXABSTRACT:
N,N-Dimethyltryptamine (DMT), a plant-derived tryptamine alkaloid, has attracted growing interest due to its therapeutic potential in treating mental health disorders resistant to conventional pharmacological interventions. This study aimed to establish an efficient methodology for the extraction, isolation, and characterization of DMT, and to identify the most viable portion of the Mimosa tenuiflora plant (root bark vs stem bark) through a multianalytical approach to assess the biomedical applicability of the isolated compound. Samples were subjected to various characterization techniques and methodological analyses. Among the tested samples, sample 2C─obtained using methodology 2, which employed the stem bark─yielded 3.45% (calculated from 5.0003 g of powdered stem bark, corresponding to approximately 0.172 g of pure DMT) and exhibited a robust phytochemical profile, with a significant presence of alkaloids, tannins, and flavonoids. Morphological characterization by scanning electron microscopy (SEM) revealed a heterogeneous, amorphous surface, whereas recrystallization produced well-defined prismatic crystals. Elemental composition, evaluated by energy-dispersive X-ray spectroscopy (EDS) and X-ray fluorescence (XRF), revealed a high proportion of carbon (76.03%) and nitrogen (23.97%), along with trace elements typical of plant matrices, such as calcium and iron. Fourier-transform infrared spectroscopy (FTIR) showed characteristic absorption bands of indole functional groups, confirming the presence of DMT. Thermogravimetric analysis (TGA) demonstrated thermal stability up to approximately 135 °C─a critical parameter for pharmaceutical processing. DMT identification was confirmed by high-performance liquid chromatography with diode-array detection (HPLC-DAD), showing a retention time of 11.81 min and absorbance peaks at 275, 280, and 288 nm, consistent with this alkaloid. Gas chromatography–mass spectrometry (GC–MS) further validated the identity, yielding a retention time of 16.4 min and 88% spectral similarity with the NIST library, including characteristic fragments at m/z 58, 130, and 188. The cellular viability of the isolated DMT exceeded 85% at therapeutic concentrations, with a significant reduction observed only at 100 μg/mL (53 ± 21%), possibly due to experimental overexposure. These findings identify sample 2C as a promising candidate for the development of standardized pharmaceutical formulations containing DMT and provide robust analytical support for future standardization, scale-up, and clinical application within the framework of psychedelic-assisted psychotherapy.
Thus, considering the objectives of this investigation in selecting the most viable methodology and plant matrix, the stem bark demonstrates greater potential for the extraction process due to its lower content of catalytic metals and reduced accumulation of minerals that could interfere with the matrix characteristics. These factors, combined with more favorable physicochemical properties such as lower density and ash content, make the stem bark more suitable. Although previous studies have reported relatively high DMT levels in the root bark of M. tenuiflora, this study employed a multifactorial evaluation that extends beyond DMT content alone, aiming to identify the optimal plant portion─stem bark or root bark─for DMT extraction. The results indicate that stem bark is the more viable option, a finding that, while less commonly reported in the literature, corroborates the work of Amariz et al., (51) who developed a factorial design for DMT extraction from stem bark.

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