Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / Este trabalho descreve o estudo fitoquÃmico de Solanum campaniforme (Solanaceae), visando o isolamento e elucidaÃÃo estrutural de novos constituintes quÃmicos bioativos, bem como o estudo do padrÃo de fragmentaÃÃo por espectrometria de massas seqÃencial com ionizaÃÃo por electrospray (IES-EM/EM) dos alcalÃides obtidos. A investigaÃÃo quÃmica realizada com o extrato etanÃlico das folhas da referida espÃcie, atravÃs de mÃtodos cromatogrÃficos, incluindo CLAE (fase reversa), resultou no isolamento e identificaÃÃo de dezenove substÃncias, sendo quatro derivados fenÃlicos: Ãcido cafÃico (SC-1), Ãster etÃlico do Ãcido cafÃico (SC-2), canferol-3-O-rutinosÃdeo (SC-3) e tiramina (SC-4), e quinze alcalÃides esteroidais: 22,23-epoxi-solanida-1,4,9-trien-3-ona (SC-5), 22,23-epoxi-solanida-1,4-dien-3-ona (SC-6), 3,9-dihidroxi-22,23-epoxi-9,10-seco-solanida-1,3,5(10)-trieno (SC-7), 12-acetiloxi-(25S)-22N-espirosol-4-en-3-ona (SC-8), (25S)-2N-espirosol-1,4-dien-3-ona (SC-9), (25S)-22N-espirosol-4-en-3-ona (SC-10), 22,23-epoxi-solanida-1,4-dien-3-ona (SC-11), 22,23-epoxi-10-epi-solanida-1,4,9-trien-3-ona (SC-12), 12-hidroxi-(25S)-22N-espirosol-4-en-3-ona (SC-13), 22,23-epoxi-solanida-4-en-3-ona (SC-14) e 22,23-epoxi-solanida-4-en-3-ona (SC-15), (E)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4,9-trien-3-imina (SC-16), (E)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4-dien-3-imina (SC-17), (Z)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4,9-trien-3-imina (SC-18) e (Z)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4-dien-3-imina (SC-19). Com exceÃÃo dos alcalÃides SC-9 e SC-10, os quais estÃo sendo relatados como produtos naturais pela primeira vez, todos os demais sÃo inÃditos. As substÃncias isoladas tiveram suas estruturas elucidadas por mÃtodos espectromÃtricos (IV, EM e RMN 1H e 13C 1D e 2D), alÃm de comparaÃÃo com dados da literatura. O padrÃo de fragmentaÃÃo dos alcalÃides foi estabelecido com base nos experimentos EM/EM e os dados obtidos foram usados na anÃlise de desreplicaÃÃo destes compostos no extrato etanÃlico bruto das folhas da espÃcie em estudo. O potencial citotÃxico dos alcalÃides majoritÃrios (SC-5 a SC-7) foi avaliado frente Ãs linhagens de cÃlulas tumorais humanas: cÃlon (HCT8), mama (MDA-MB-435), leucemia (HL60) e cÃrebro (SF295), porÃm mostraram-se inativos. Estes compostos tambÃm foram investigados quanto as suas propriedades antiofÃdicas frente ao veneno de Bothrops pauloensis, mostrando significativos efeitos anti-miotÃxico, anti-hemorrÃgico e anti-necrosante. AlÃm disso, foi avaliado o efeito da tiramina sobre o metabolismo de animais com dislipidemia e obesidade, a qual apresentou efeito terapÃutico relacionado à reduÃÃo dos nÃveis de colesterol. / Este trabalho descreve o estudo fitoquÃmico de Solanum campaniforme (Solanaceae), visando o isolamento e elucidaÃÃo estrutural de novos constituintes quÃmicos bioativos, bem como o estudo do padrÃo de fragmentaÃÃo por espectrometria de massas seqÃencial com ionizaÃÃo por electrospray (IES-EM/EM) dos alcalÃides obtidos. A investigaÃÃo quÃmica realizada com o extrato etanÃlico das folhas da referida espÃcie, atravÃs de mÃtodos cromatogrÃficos, incluindo CLAE (fase reversa), resultou no isolamento e identificaÃÃo de dezenove substÃncias, sendo quatro derivados fenÃlicos: Ãcido cafÃico (SC-1), Ãster etÃlico do Ãcido cafÃico (SC-2), canferol-3-O-rutinosÃdeo (SC-3) e tiramina (SC-4), e quinze alcalÃides esteroidais: 22,23-epoxi-solanida-1,4,9-trien-3-ona (SC-5), 22,23-epoxi-solanida-1,4-dien-3-ona (SC-6), 3,9-dihidroxi-22,23-epoxi-9,10-seco-solanida-1,3,5(10)-trieno (SC-7), 12-acetiloxi-(25S)-22N-espirosol-4-en-3-ona (SC-8), (25S)-2N-espirosol-1,4-dien-3-ona (SC-9), (25S)-22N-espirosol-4-en-3-ona (SC-10), 22,23-epoxi-solanida-1,4-dien-3-ona (SC-11), 22,23-epoxi-10-epi-solanida-1,4,9-trien-3-ona (SC-12), 12-hidroxi-(25S)-22N-espirosol-4-en-3-ona (SC-13), 22,23-epoxi-solanida-4-en-3-ona (SC-14) e 22,23-epoxi-solanida-4-en-3-ona (SC-15), (E)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4,9-trien-3-imina (SC-16), (E)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4-dien-3-imina (SC-17), (Z)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4,9-trien-3-imina (SC-18) e (Z)-N-[8â(4-hidroxifenil)etil]-22,23-epoxi-solanida-1,4-dien-3-imina (SC-19). Com exceÃÃo dos alcalÃides SC-9 e SC-10, os quais estÃo sendo relatados como produtos naturais pela primeira vez, todos os demais sÃo inÃditos. As substÃncias isoladas tiveram suas estruturas elucidadas por mÃtodos espectromÃtricos (IV, EM e RMN 1H e 13C 1D e 2D), alÃm de comparaÃÃo com dados da literatura. O padrÃo de fragmentaÃÃo dos alcalÃides foi estabelecido com base nos experimentos EM/EM e os dados obtidos foram usados na anÃlise de desreplicaÃÃo destes compostos no extrato etanÃlico bruto das folhas da espÃcie em estudo. O potencial citotÃxico dos alcalÃides majoritÃrios (SC-5 a SC-7) foi avaliado frente Ãs linhagens de cÃlulas tumorais humanas: cÃlon (HCT8), mama (MDA-MB-435), leucemia (HL60) e cÃrebro (SF295), porÃm mostraram-se inativos. Estes compostos tambÃm foram investigados quanto as suas propriedades antiofÃdicas frente ao veneno de Bothrops pauloensis, mostrando significativos efeitos anti-miotÃxico, anti-hemorrÃgico e anti-necrosante. AlÃm disso, foi avaliado o efeito da tiramina sobre o metabolismo de animais com dislipidemia e obesidade, a qual apresentou efeito terapÃutico relacionado à reduÃÃo dos nÃveis de colesterol. / This work describes the phytochemical investigation of Solanum campaniforme (Solanaceae), aiming the isolation and structural elucidation of new bioactive chemical constituents, as well as the study of their fragmentation pattern under electrospray ionization tandem mass spectrometry (ESI-MS/MS) of the isolated alkaloids. The chemical investigation performed with the ethanol extract from leaves of this species by chromatographic methods, including HPLC (reverse phase), resulted in the isolation and identification of nineteen compounds, being four of them phenol derivatives: caffeic acid (SC-1), caffeic acid ethyl ester (SC-2), kaempferol-3-rutinoside (SC-3) and tyramine (SC-4), and fifteen steroidal alkaloids: 22,23-epoxy-solanida-1,4,9-trien-3-one (SC-5), 22,23-epoxy-solanida-1,4-dien-3-one, (SC-6), 3,9-dihydroxy-22,23-epoxy-9(10)-seco-solanida-1,3,5(10)-triene (SC-7), 12-acetoxyl-(25S)-22N-spirosol-4-en-3-one (SC-8), (25S)-22N-spirosol-1,4-dien-3-one (SC-9), (25S)-22-N-spirosol-4-en-3-one (SC-10), 22,23-epoxy-solanida-1,4-dien-3-one (SC-11), 22,23-epoxy-10-epi-solanida-1,4,9-trien-3-one (SC-12), 12-hydroxy-(25S)-22N-spirosol-4-en-3-one (SC-13), 22,23-epoxy-solanida-4-en-3-one (SC-14) and 22,23-epoxy-solanida-4-en-3-one (SC-15), (E)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4,9-trien-3-imine (SC-16), (E)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4-dien-3-imine (SC-17), (Z)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4,9-trien-3-imine (SC-18) and (Z)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4-dien-3-imine (SC-19). Except the alkaloids SC-9 and SC-10, which are being reported as natural products for the first time, all others are unknowns. The structure of all isolated compounds were elucidated by spectral) methods (IR, HR-ESI-MS, 1H and 13C NMR 1D and 2D and by comparison with literature data. The fragmentation pattern of the alkaloids was established based on MS/MS experiments and the data were used for the dereplication these compounds present in the crude ethanol extract from leaves of S. campaniforme. The cytotoxic potencial of the main alkaloids (SC-5 and SC-7) was evaluated against the human tumor cell lines (HCT8, MDA-MB-435, HL6 and SF295), however, no one showed any activity. The antiophidic properties of the same compounds were also investigated against Bothrops pauloensis venom, showing anti-myotoxic, anti-hemorrhagic and anti-necrosis effects. In addition, was evaluated the effect of tyramine on the metabolism of animals with dyslipidemia and obesity, which exhibited therapeutic effect associated to reduction of the cholesterol levels / This work describes the phytochemical investigation of Solanum campaniforme (Solanaceae), aiming the isolation and structural elucidation of new bioactive chemical constituents, as well as the study of their fragmentation pattern under electrospray ionization tandem mass spectrometry (ESI-MS/MS) of the isolated alkaloids. The chemical investigation performed with the ethanol extract from leaves of this species by chromatographic methods, including HPLC (reverse phase), resulted in the isolation and identification of nineteen compounds, being four of them phenol derivatives: caffeic acid (SC-1), caffeic acid ethyl ester (SC-2), kaempferol-3-rutinoside (SC-3) and tyramine (SC-4), and fifteen steroidal alkaloids: 22,23-epoxy-solanida-1,4,9-trien-3-one (SC-5), 22,23-epoxy-solanida-1,4-dien-3-one, (SC-6), 3,9-dihydroxy-22,23-epoxy-9(10)-seco-solanida-1,3,5(10)-triene (SC-7), 12-acetoxyl-(25S)-22N-spirosol-4-en-3-one (SC-8), (25S)-22N-spirosol-1,4-dien-3-one (SC-9), (25S)-22-N-spirosol-4-en-3-one (SC-10), 22,23-epoxy-solanida-1,4-dien-3-one (SC-11), 22,23-epoxy-10-epi-solanida-1,4,9-trien-3-one (SC-12), 12-hydroxy-(25S)-22N-spirosol-4-en-3-one (SC-13), 22,23-epoxy-solanida-4-en-3-one (SC-14) and 22,23-epoxy-solanida-4-en-3-one (SC-15), (E)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4,9-trien-3-imine (SC-16), (E)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4-dien-3-imine (SC-17), (Z)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4,9-trien-3-imine (SC-18) and (Z)-N-[8â(4-hydroxyphenyl)ethyl]-22,23-epoxy-solanida-1,4-dien-3-imine (SC-19). Except the alkaloids SC-9 and SC-10, which are being reported as natural products for the first time, all others are unknowns. The structure of all isolated compounds were elucidated by spectral) methods (IR, HR-ESI-MS, 1H and 13C NMR 1D and 2D and by comparison with literature data. The fragmentation pattern of the alkaloids was established based on MS/MS experiments and the data were used for the dereplication these compounds present in the crude ethanol extract from leaves of S. campaniforme. The cytotoxic potencial of the main alkaloids (SC-5 and SC-7) was evaluated against the human tumor cell lines (HCT8, MDA-MB-435, HL6 and SF295), however, no one showed any activity. The antiophidic properties of the same compounds were also investigated against Bothrops pauloensis venom, showing anti-myotoxic, anti-hemorrhagic and anti-necrosis effects. In addition, was evaluated the effect of tyramine on the metabolism of animals with dyslipidemia and obesity, which exhibited therapeutic effect associated to reduction of the cholesterol levels